How to Sell on Causee — The Complete Guide for 2026

On this page

• What Causee actually is
• Why sell on Causee at all?
• The charity model, read carefully
• What it costs to sell — the honest version
• Setting up a Causee seller account
• What a Causee listing holds, field by field
• Photos, and the 20 MB rule
• Postage: you price it, you ship it
• How buyers actually find your listings
• Getting paid, and the escrow clock
• What is selling on Causee right now
• Five mistakes that will cost you sales here
• Crosslisting to Causee with FLUF Connect
• What FLUF Connect costs
• Sources and verification

What Causee actually is

Causee is a UK consumer-to-consumer resale marketplace that charges its sellers nothing and donates its own corporate profits to charity. It launched to the public in autumn 2026, focuses on pre-loved fashion, and runs entirely in pounds sterling for UK buyers and sellers. It is the rare marketplace whose pitch is not “we take less” but “we take nothing, and what we do earn goes somewhere useful”.

The legal entity behind it is Causee Limited, company number 11919858, registered at 71–75 Shelton Street, London WC2H 9JQ. There is a wrinkle worth knowing, because it changes how you read the “new startup” framing in the press: the company was incorporated on 2 April 2019 under the name Labayk Inc Limited, and was renamed Causee Limited on 23 March 2026. Trade coverage describes the business as “founded in 2025”. Both things can be true — a 2019 shell repurposed for a 2025 idea — but the marketplace itself is genuinely months old, not years, and the company register is the document to trust on the corporate history. Causee’s own site still carries a page explaining what Labayk was, which corroborates the rename rather than hiding it.

The founder and chief executive is Tanweer Khan, who describes the role publicly as an unpaid, mission-led social enterprise position. Causee is not a registered charity, and it says so itself: its FAQ states that “Causee is not a registered charity. We operate using a social enterprise model.” That distinction matters legally and it matters for what you can honestly tell a buyer.

Technically, Causee is built on Sharetribe, an off-the-shelf marketplace platform. That is an unglamorous fact with a genuinely useful consequence for sellers: the whole marketplace speaks a documented, public API, so tools like FLUF Connect can list to it directly from a server rather than driving a browser. Marketplaces that roll their own stack usually need a browser extension running on your own machine. Causee does not.

The charity model, read carefully

This is the part most coverage gets slightly wrong, so it is worth being precise. On Causee, the seller does not donate anything. You keep the full price you sold at. What gets donated is Causee’s own profit as a company.

Causee’s FAQ puts it in as many words: “Do sellers donate their profits to charity? No. Sellers keep 100% of the price they sell their items for. Causee does not ask sellers to donate their profits. Instead, Causee donates its own profits…” There is no opt-in donation at checkout and no percentage slider. The press release language confirms it: buyers and sellers “are not asked to make an additional donation or opt into a charitable contribution”.

The phrase you will see everywhere is “100% of profits go to charity”. Causee’s own wording is more carefully hedged than the headline, and you should quote the careful version if you are describing the platform to a buyer: “After covering our operating costs, investing in the ongoing development of the platform, maintaining prudent working capital and appropriate financial reserves, 100% of Causee’s own profits are donated to charities.” That is four deductions ahead of the hundred per cent. It is not a criticism — every trading company has costs — but “100% of profits” and “100% of revenue” are very different claims, and only the first one is being made.

The founding charity partner is Pepala, a UK organisation that redirects surplus British educational supplies to schools in Malawi and says it has delivered more than 120,000 donated items. Causee’s Social Impact page names five cause themes it intends to fund — feeding the hungry, treating the sick, educating children, providing clothing and safe housing — but does not publish distribution percentages or a governance mechanism for how charities are chosen.

The charity picker is not live yet

Causee’s marketing talks about “charities chosen by our community”, and the marketplace configuration really does contain a listing field labelled “Pick a charity to support” with ten well-known options behind it. It is not switched on. The field is scoped to a listing type that does not exist on the live marketplace, so it never renders on the listing form. The FAQ concedes the point in the future tense: as the community grows, buyers and sellers “will have increasing opportunities to support the causes they care about”.

So: do not tell a buyer they are choosing a charity when they buy from you, and do not describe your own listing as supporting a named cause. Today the accurate sentence is that Causee, the company, donates its profits, with Pepala as its first named partner.

How this differs from eBay for Charity

The comparison people reach for is eBay for Charity, and the structures are almost mirror images. On eBay, the seller nominates a charity and donates a chosen percentage of their own sale proceeds; eBay discounts its fees proportionally. On Causee, the seller donates nothing and keeps everything, and the platform donates its own profit. If your motivation is to give a specific share of a specific sale to a specific cause, eBay for Charity does that and Causee currently does not. If your motivation is to sell somewhere whose business model is not extracting a margin from you, Causee is the one built for that.

Why sell on Causee at all?

The honest answer is that Causee is worth a slot in your listing rotation, not a bet-the-shop commitment. Here is the case, for and against, in the order that matters.

You keep everything you sell for

Zero per cent is a rare number in resale, and it is not a promotional rate with a review date attached — it is how the business is designed to work, with the platform’s income coming from the buyer’s side instead. On a £30 jumper you receive £30. The same jumper on eBay as a business seller in the clothing category loses roughly 12% plus a fixed per-order charge; on a consignment site it can lose half. Vinted also charges private sellers nothing, so Causee is not unique in this — but it is in the small group that does.

The competition for attention is thin

Two thousand live listings is a rounding error next to any established marketplace, and that is the argument as much as it is the problem. With no promoted-listing product, no paid boosts and no algorithmic ranking to fight, a well-titled listing on Causee is competing against a few hundred others in its category rather than a few hundred thousand. If you have school uniform, children’s clothing or mid-range high-street fashion, you are close to the front of a very short queue.

The proposition is genuinely different, and buyers respond to that

Most resale marketplaces sell convenience or price. Causee sells a reason. Whether that converts at scale is unproven — there is no independent traffic or sales data on the platform at all — but it is a differentiated pitch in a category where nearly everything else competes on the same two axes, and it gives you something to say in a listing description that is true and that no competing seller on Vinted can say.

And the honest case against

There are no published buyer numbers, no GMV figure, no funding announcement, no independent journalism and, as of today, no Trustpilot profile, Reddit thread or user review anywhere that we could find. There are no mobile apps yet. Payouts take around a fortnight end to end. The schema will not hold a brand name or a letter size. Any one of those is survivable; together they mean Causee should be somewhere your stock also is, duplicated automatically at no marginal effort, rather than somewhere you move your business to. That is precisely the case for crosslisting to it rather than migrating to it.

What it costs to sell — the honest version

Selling on Causee costs the seller nothing. That is not marketing shorthand; it is what the marketplace’s own machine-readable commission configuration says, and a configuration file is harder to argue with than a landing page. The provider commission is set to zero per cent.

The Protection Fee amount is genuinely not published anywhere. We checked the dedicated Protection Fee page, the FAQ, the terms of service, the blog and the marketplace’s own public configuration assets. The configuration exposes the provider commission and deliberately does not expose a customer commission, which means the buyer-side fee is calculated privately on Causee’s servers. Causee describes it only as “a small Protection Fee”. If you want to know what your buyer will actually be charged, add an item to a basket and look — do not rely on a number from a third-party article, including this one, because there isn’t one to rely on.

What that fee buys the buyer is set out in the Purchase Protection Programme: cover for non-delivery, for damage in transit and for items that are not as described. It is explicitly not insurance and not a product guarantee, and it does not cover a buyer changing their mind. A buyer has five days from delivery to raise a claim, which is a tight window by marketplace standards and worth knowing when you decide how carefully to pack something.

Setting up a Causee seller account

Registration is a normal email-and-password signup on www.causee.com — there is no application, no invitation and no seller vetting step. What does gate you is payouts. Causee runs payments through Stripe Connect, and until you have completed Stripe’s onboarding your listings cannot accept an order. Buyers who reach a listing from a seller who has skipped this see a message saying the listing is unavailable because the author has not added their payout details.

Stripe onboarding is the usual set: legal name, date of birth, address, a bank account in your name, and identity verification. Do it before you list rather than after, because a listing that goes live without it is a listing that quietly cannot be bought.

Causee does not currently distinguish between private and business sellers. Its terms treat transactions as consumer-to-consumer throughout, there is no business-seller registration flow and no VAT-registered tier. The only trace of business selling anywhere in the platform is an optional per-listing VAT field offering 20%, 5% or 0%, which is hidden from search filters and appeared on only four of sixty listings we sampled. If you trade at scale, that absence is worth factoring in: you are using a marketplace that has not yet built for you.

Bulk upload exists

Unusually for a marketplace this young, Causee ships a native bulk-upload tool at /bulk-upload, and its FAQ confirms it: “Can I upload multiple listings? Yes. Our Bulk Upload feature makes it easy to upload multiple listings and manage larger inventories.” If you have a spreadsheet of stock and no crosslisting tool, that is the fastest route in.

What a Causee listing holds, field by field

This is the section that decides whether Causee will work for your inventory, because its schema is narrower than most sellers expect. Everything below comes from the marketplace’s live listing-field configuration and from a sample of sixty published listings, not from marketing copy.

There is no brand field

Causee’s schema has no brand key at all — not optional, not hidden, absent. Across sixty sampled listings, sellers who wanted to communicate a brand had typed it into the title or written “Brand: Primark” into the description body by hand.

The practical consequences are worth spelling out. A buyer cannot filter by brand, because there is nothing to filter on. Your Nike trainers are found by someone typing “Nike” into the keyword search, which searches your title and description text. So on Causee, unlike on Vinted or Depop, the brand name belongs in the title — it is not redundant duplication, it is the only mechanism you have. With a 60-character ceiling that gets tight quickly, which is why Causee titles reward a ruthless brand-item-colour-size ordering and no adjectives.

Sizing is narrower than most sellers expect

Causee’s size vocabulary covers UK women’s numeric clothing sizes 4 to 24, shoe sizes 3 to 13 including half sizes, separate infant and kids shoe scales, and baby age bands from 0–1 months to 3–4 years. There is no S/M/L/XL scheme and no men’s sizing scheme.

If your stock is letter-sized — and a great deal of resale stock is — there is no honest size to select. A medium jumper is not a UK 12, and guessing a number sells someone the wrong garment and buys you a return. FLUF Connect’s Causee integration deliberately drops a letter size rather than inventing a number for it, and logs each time it does, so the size filter simply does not apply to that listing. It is the right call, but it means letter-sized items are less discoverable on Causee than numerically sized ones. Put the size in the title in that case.

Five conditions, and no bottom rung

The condition enum is exactly five values: New, New with tags, Used – Excellent, Used – Good and Handmade. Note what is not there. There is no “Fair”, no “Satisfactory” and no “Poor”. A genuinely well-worn item that you would grade honestly as “fair” on Vinted or eBay has nowhere accurate to land, and gets rounded up to “Used – Good”.

That is a trap. The condition dropdown will overstate the item and the buyer’s five-day not-as-described window is short. If you list something at the rough end, describe the wear explicitly in the description and photograph it. The dropdown cannot say it for you.

“Handmade” sitting inside the condition list rather than as a separate item type is a small oddity worth using: crafters have a legitimate home here, and Causee’s stated launch focus includes small businesses and crafters alongside pre-loved fashion.

Photos, and the 20 MB rule

Causee accepts JPG, GIF and PNG at up to 20 MB per image. One photo is the minimum; we observed listings carrying up to fifteen. The generous file-size ceiling means you do not need to compress phone photos before uploading, which removes a step that costs most sellers quality.

Because there is no brand field and the size vocabulary is limited, your photos are carrying more weight here than on a marketplace with rich structured data. Practical rules that apply with more force on Causee than elsewhere: shoot the label and the size tag as their own frames, because for a letter-sized garment that photo is the size data; shoot any flaw you are about to describe, because the five-day claim window rewards proving condition up front; and lead with a clean, well-lit, uncluttered first image, because Causee’s search results are a straightforward image grid with no video, no styling overlays and nothing else to distinguish you.

Postage: you price it, you ship it

Causee has no integrated shipping labels and no courier partner. This is one of the biggest day-to-day differences from Vinted, where postage is bought inside the app and a label appears.

Instead, every listing carries two required postage fields: a shipping price for one item, and a shipping price for each additional item bought together. You set both. When the item sells, you buy postage yourself, send it however you like, and mark the order shipped in Causee. Local pickup is supported as an alternative or an addition — nine of the sixty listings we sampled offered it, which is a meaningful share and suggests bulkier home and garden stock is moving that way.

Two things follow. First, price your postage properly, because there is no marketplace-negotiated rate subsidising a mistake and no cap protecting you from one. Weigh the item, price the service you will actually use, and set the additional-item price low enough that bundles remain attractive. Second, there is no tracking integration. Causee’s protection programme covers non-delivery claims, and without an automatic tracking record your own proof of postage is the only evidence you will have. Keep it.

Returns

Causee does not publish a standalone returns policy. Its terms note that consumer-to-consumer sales fall outside the statutory cancellation rights that apply to trader sales, and the Purchase Protection Programme explicitly excludes a buyer changing their mind. Who pays return postage in a successful not-as-described claim is not documented. In practice, be conservative: describe flaws in writing, keep your messages inside Causee, and treat a well-photographed listing as your protection.

How buyers actually find your listings

Causee’s search exposes a deliberately small set of filters: keyword, price band, category, sub-category, condition and colour. There is no brand filter, no sort-by-newest promotion mechanic, no paid boost and no promoted-listing product. There is nothing to buy your way up with, which cuts both ways — nobody is outspending you, and nothing you do lifts you either.

Given that, the levers you do control are narrow and clear:

• Keywords in the title. With no brand field and only 60 characters, the title is your entire structured-data budget. Brand, item, colour, size, in that order, no filler.
• The description as a second keyword surface. Keyword search reads it. This is where the material, the fit, the era and the alternative names for the item belong — “jumper” and “sweater”, “trainers” and “sneakers”.
• Correct category and sub-category. These are real filters buyers use, and “Other” is where 13% of the catalogue currently sits — a large, badly-browsable bucket you generally want to stay out of if a real category fits.
• Colour. Optional, single-value, and set on well under half the listings we sampled. Filling it in is close to free differentiation.

Getting paid, and the escrow clock

Money moves through Stripe Connect and sits in escrow along the way. The sequence is: the buyer pays, Stripe holds the funds, you ship and mark the order as shipped, delivery is confirmed, and the funds are released to you seven days after that confirmation. Causee’s FAQ then says payments “typically arrive within 3–7 business days”.

Add it up honestly before you rely on this as working capital: from the buyer clicking pay to money in your bank is realistically a fortnight, sometimes more. That is slower than Vinted and much slower than a Depop or eBay payout. It is also the mechanism that makes the buyer protection meaningful, so it is a trade rather than a flaw — but plan for it.

No minimum payout threshold is published. Neither is any specific hold policy beyond the protection window.

Tax

Nothing about Causee changes your UK tax position, and the platform’s newness does not exempt it. If you are selling your own used possessions, that is generally not trading income. If you are buying to resell, it is, and the £1,000 trading allowance and self-assessment rules apply exactly as they do on any other marketplace. Digital platforms operating in the UK report seller data to HMRC under the same rules regardless of size, so treat income here as visible. If you are near the thresholds, take advice rather than a rule of thumb from a marketplace guide.

What is selling on Causee right now

We counted the live catalogue on 3 September 2026. It is small enough to measure exactly, which is a rare luxury.

Fashion is not merely the largest category, it is nearly two thirds of everything on the platform, and the sub-category vocabulary confirms the intent — every sub-category is an apparel one. Causee’s own FAQ names the launch focus as pre-loved fashion, children’s school uniforms and selected accessories. School uniform is a genuine differentiator and one very few marketplaces court deliberately; if you have uniform stock, this is an unusually uncontested place to put it.

Prices are low. In a random sample of sixty listings, everything fell between £1.00 and £65.00. Causee is a low-ticket marketplace today, and pricing a £300 designer piece here is fighting the current. That will change if the buyer base grows; right now, match the room.

Five mistakes that will cost you sales here

1. Leaving the brand out of the title. On most marketplaces this is a duplication. Here it is the only way anyone finds your item by brand, because the field does not exist.
2. Listing before finishing Stripe onboarding. Your listings go live and quietly cannot be purchased. Buyers see an “unavailable” message, not an error you will ever be told about.
3. Grading a rough item as “Used – Good” and leaving it there. There is no lower rung, so the dropdown flatters the item. Write the wear into the description and photograph it, or expect a claim inside the five-day window.
4. Guessing a numeric size for a letter-sized garment. A medium is not a UK 12. Leave the size unset and say “size M” in the title instead.
5. Under-pricing postage. There is no integrated label, no negotiated rate and no safety net. You are buying the postage yourself at retail.

Crosslisting to Causee with FLUF Connect

Causee is unusually friendly to crosslisting, and says so in its own help pages rather than tolerating it quietly. Two verbatim answers from its FAQ: “Can I still sell on other marketplaces? Absolutely. You are free to continue selling on other marketplaces. Causee does not require exclusivity.” And: “Can I copy my listings from another marketplace? Yes. Our tools make it easy to copy listings you’ve already created elsewhere.”

Because Causee runs on a documented public API, FLUF Connect lists to it server-side. You connect the channel once with your Causee credentials and nothing else has to be running — no browser extension, no open tab, no computer left on. That is a meaningful difference from extension-first channels like Vinted, where the work happens in your own browser.

What FLUF Connect does on this channel:

• Creates listings from your FLUF catalogue — title, description as plain text, price, photos, category, sub-category, size, condition and colour, each mapped onto Causee’s own vocabulary.
• Edits live listings — title, description, price and attributes, sent as a partial update so nothing you changed on Causee directly gets clobbered.
• Delists automatically when the item sells elsewhere. This is the mark-as-sold direction, and it is the automation that actually prevents overselling.

What it does not do on Causee, stated plainly because a false capability claim is worse than a missing one: there is no automatic relisting, no offer management and no order sync from Causee. A sale that happens on Causee is not currently detected, so you remove the copies from your other channels yourself. Those features exist in FLUF Connect on the channels that support them; Causee is not yet one of them.

The mapping decisions worth knowing about

Three of Causee’s quirks force real choices, and it is better to know how they are resolved than to discover it in a listing.

Currency. Causee is GBP-only. If your catalogue prices in euros or dollars, FLUF converts before listing. If a conversion cannot be performed, the listing is refused rather than published — posting a euro number as though it were pounds would be a silent mis-price, and a refusal you can see beats a sale at the wrong price.

Size. Causee’s sizes are prefixed by garment family, so the same “8” is a clothing 8 or a shoe 8 depending on the sub-category. If the family cannot be established, or the size is a letter, the field is left empty rather than guessed. Where an explicit numeric UK size appears in the title — “womens 10”, “UK 12” — that counts as evidence and is used.

Category. Your product is mapped to one of Causee’s ten categories, and to a fashion sub-category where one genuinely applies. Non-fashion items simply carry no sub-category, which matches how live non-fashion listings on Causee are actually structured. “Other” is used as an honest fallback rather than forcing a wrong category.

One operational note: Causee’s create endpoint has no idempotency key, so a request that times out is genuinely ambiguous — the listing may or may not have been created. FLUF says so rather than retrying blindly, because a blind retry is how you end up with the same item listed twice.

What FLUF Connect costs

FLUF Connect starts at 7 days for £1, then from £9/month. There is no free plan. Every plan includes unlimited crosslisting across every supported channel; the tiers differ in how often sales are checked and how much history you keep, not in how many items you may list.

For a Causee seller specifically, Starter is normally the right entry point. Relisting and offer management are the features that justify the higher tiers, and neither is available on Causee — so if Causee is the channel you are adding, you are paying for the crosslisting and the mark-as-sold protection, both of which Starter covers. Automation is included in every plan rather than sold as an add-on; you simply get it on the channels that support it.

Sources and verification

Every figure, limit and policy on this page was checked against a primary source on 3 September 2026, and the live catalogue was counted rather than estimated. Where Causee does not publish something — the Protection Fee amount is the important case — we say so rather than repeating a number from elsewhere.

• Seller keeps 100%, no seller donation, bulk upload, no exclusivity, copying listings from other marketplaces, payout timing, not a registered charity — Causee FAQ
• Protection Fee, and the absence of a published amount — Causee Protection Fee
• Buyer cover, exclusions and the five-day claim window — Purchase Protection Programme
• Prohibited items — Prohibited Items Policy
• Profit-donation wording and cause themes — Social Impact; legal entity and address — Terms of Service
• Causee Limited, company no. 11919858, incorporated 2 April 2019 as Labayk Inc Limited, renamed 23 March 2026 — Companies House
• Founder, launch timing and founding charity partner Pepala — Charity Today, 25 August 2026 and Retail Technology Innovation Hub, 24 August 2026
• Pepala’s work and donated-item figure — pepala.org.uk
• eBay’s seller-nominated donation model, for the contrast drawn above — eBay for Charity
• Listing schema, category counts, size and condition vocabularies, zero provider commission and the minimum price — Causee’s own public marketplace configuration assets and a sample of 60 live listings, measured 3 September 2026
• Field limits, currency handling and channel capabilities — FLUF Connect’s own Causee integration and channel registry, verified 3 September 2026

Related guides

• Sell on Vinted — the UK marketplace most Causee sellers also use
• Sell on Depop — fees, audience and what actually sells
• Sell on eBay — including eBay for Charity, the other charitable model
• Sell on Bidzzy — another young UK marketplace that charges sellers nothing
• All marketplace guides
• All crosslisting routes