How Do Online Marketplaces Verify Both Buyers and Sellers?
Written by Christopher Krassnig - Founder - Kairos Exchange and ZenoX Media. Last reviewed 4 September 2026.
The two sides cannot be checked to the same standard: a seller's revenue sits in store data, and a buyer's money does not. Kairos reconciles seller revenue against the store's Shopify order ledger. The buyer side is a funds review, where a person reads a typed legal name, a country and a self-declared euro figure, then clears it. The cleared status reads Reviewed, never verified.
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What Does a Marketplace Check on the Seller?
The seller side is the checkable one, because the data already exists and a store owner can grant read access to it. Kairos reads that order ledger over a read-only Shopify connection, matches the revenue a seller claims against what the orders say, and puts a person on the flags before the memo publishes. The split it publishes is the useful part. 3 of the 8 checks read that ledger and can pass the day a store connects, 4 wait on feeds Kairos does not pull, and 1 has nothing to compare against until the second weekly run. Two of those 4 have no automatic source on Kairos at all, ad spend and processor payouts, and a person opens those accounts by hand in the paid tier. Ask for that same breakdown wherever you list, because a badge that will not break itself down is doing marketing.
What Does a Marketplace Check on the Buyer?
Far less, and almost nobody publishes it. On Kairos a buyer confirms their email address before they can sign the NDA, and the signature is stored with the NDA version, the IP address it came from and the browser that sent it. Then comes the funds review, and its exact shape matters. The buyer types a full legal name, a country, a US state where that applies, and a euro figure for the money they say they have, plus an optional note. A person on the Kairos side reads that and either clears it or leaves it pending. No bank statement is involved, no document and no independent evidence of any kind. The panel says as much to a cleared buyer in its own words: treat this as a sanity check, not proof of funds. That is also why a cleared buyer's status on the settings page reads Reviewed rather than Verified.
What Does a Thin Buyer Check Cost a Seller?
An NDA stops a leak. It does nothing about a signer who opens your full financials, reads them and never replies again, and that is the cost a seller actually feels. Kairos puts the funds review in front of that door: the exact revenue and profit, the real brand name and the verification memo open only for a buyer whose review has cleared, and the look itself is free. The refundable EUR 250 deposit sits on the offer instead, where the intent is real, and it comes back if that offer is withdrawn, declined or beaten. Your own dashboard then flags each listing where buyers opened your numbers and went quiet for seven days or more: how many of them did it, and how long the longest silence has run. It names no one, because the row is a count and a clock, not a buyer. None of that makes a buyer solvent. It makes a ghost visible, and it puts a real cost on a bid that was never serious.
What Should You Ask a Marketplace About Its Buyers?
A short list of questions travels to any venue. Is anything checked about the buyer before my financials open, or does a signature do all the work? What was actually read, a document or a typed claim? Can I see how many buyers opened my numbers and how long they have been quiet since? Does money sit behind a bid, or only behind a look? Kairos answers those four with a human funds review, a cleared status that reads Reviewed, a per-listing count of the buyers who opened your numbers and went quiet, and a refundable deposit that sits on the offer. The honest limit sits under all of them. A cleared buyer is someone whose story a person read and believed, which is a filter rather than a bank confirmation, and a venue that never asks for a bank has proved nothing about anyone's money.
Answered. Now Get Your Numbers Proven
Sellers on the list go through verification first when we open. Reading up is step one. Having your revenue proven from your own orders is step two.