Every reseller eventually encounters a captcha, a slowdown, or a warning email from a marketplace. It is not because you did something wrong — it is because every marketplace runs an automated security system that scores every request as more-or-less human-looking. When a score drops below a threshold, the marketplace pauses to ask for proof that there is a real person behind the activity.
Understanding how these systems work makes the occasional flag much less stressful — and tells you which actions on your end keep your accounts in good standing.
Who is flagging what
Mercari — strictest bot detection in the resale space
Poshmark — layered behavioral checks
Depop + Vinted — medium-strictness bot detection
eBay and Shopify — official APIs
What triggers flags
A few specific things trigger flags from any of the four browser-based marketplaces. Very fast listing creation looks like a bot, even for real humans — 50 listings in 5 minutes from a single account will get a slowdown. Listing from an IP that does not match your usual region (using a VPN, traveling internationally without notice) also raises scores.
Repeated failed logins matter — typing your password wrong four times in a row can trigger a wall. And marketplace algorithm changes happen 2-4 times a year — sometimes a policy shift causes brief turbulence for everyone, including sellers doing nothing different.
How Closo stays under the radar
Closo posts sequentially, not in parallel — one listing at a time per marketplace, never all six at once. The Sharer runs in human cadence with active-hours windows and randomized delays between shares, not robotic regularity. Region-pinned residential IPs mean your work always comes from your geographic region, never from a datacenter.
And Closo's requests look exactly like a real Chrome browser on your operating system — the headers, the sign-in handshake, the page-level checks all match a real Chrome, not a script.
Closo Cloud's role
On Unlimited, Closo Cloud uses the same residential network pinned to your region plus a Chrome configured to match real sellers' browsers. The work runs from the same browser that warmed the connection — no swap between refresh and action. To the marketplace, every request looks like one consistent visitor.
What to do if you are flagged
1. Open the marketplace in your normal browser and complete any captcha or human check it presents.
2. Wait about 30 minutes — let the marketplace's bot score reset after the human verification.
3. Click Reconnect on that marketplace in Closo. The fresh session gets picked up by both your extension and Closo Cloud.
4. Slow down for 24 hours — let new listings come through one at a time rather than batching, and skip any heavy bulk-edit runs until your score climbs back.
When to contact us
If you see account suspended rather than captcha required, that is a different category — the marketplace has paused your account pending review. Open a support thread and we can help you understand the email the marketplace sent. If you are flagged across multiple marketplaces simultaneously, the cause is usually IP-related (recent VPN use, recent travel) and we can help diagnose.
Open Marketplaces