How we verify FBA prep centers.
This page explains how we keep listings credible for buyers. Every published prep center cleared our 4-point operator standard before going live. Operators update their own details directly through the "claim this listing" flow. We run automated liveness checks and re-verify on user reports. A listing we have not re-confirmed recently shows a stale badge rather than hiding it. If a check fails, the listing is flagged with the failure reason visible on the profile page.
Every listing clears all four, or it doesn't get published.
- 01
Business operating > 12 months
State business registry confirms the legal entity. LinkedIn-confirmed founders. First public listing on prepcenter.com or amzprep.com no later than 12 months prior to our verification date. We want a track record, not a one-month-old shop fishing for inbound leads.
- 02
FDA registration confirmed from the source
Only for centers that claim FDA registration (required for facilities that pack or hold food or dietary supplements). We confirm it from the registration confirmation FDA issued to the operator, because food facility registrations are not publicly searchable. A claim we cannot confirm stays the operator's statement and is never printed as fact.
- 03
Website returns 200 + matches Amazon FBA keywords
The domain resolves and the homepage returns HTTP 200 with real content, not a parked or placeholder page. The operator's own visible site text names its Amazon FBA prep service (Amazon, FBA or FNSKU). General prep-services or 3PL wording alone doesn't qualify, and neither do hidden page tags or a customer review quoted on the site. Naming the service isn't enough on its own: a pick-and-pack page relabeled as FBA prep fails. We don't list centers that bury their FBA capability behind a contact form.
- 04
Manual editor review at listing + on user reports
A human reads the listing before publication and cross-checks the center's name against Amazon-seller forums, Reddit r/FulfillmentByAmazon complaints, and BBB. We re-review any time a seller reports an issue, and automated liveness checks flag a dropped site between reviews. We re-confirm pricing notes and update retrieval dates. At the first credible red flag, the listing flips to flagged.
Every listing is typed for what it actually is.
As of July 2026 every listing carries an explicit operator type. Prep specialists and multi-service operators (prep-primary with a real co-primary fulfillment, packaging, sourcing, or storage line, disclosed on the profile) clear the full 4-point standard above. Full 3PLs clear a typed standard of their own: a real registered entity operating more than 12 months, a live maintained site, a substantive FBA prep service line rather than a keyword page, and a working contact channel, plus the same fabrication screens as everyone else. Quote-based pricing is accepted for 3PLs and stated as such.
What the type changes: full 3PLs are never ranked on our editorial ranking pages and never counted in prep-specialist stats, and every non-specialist listing carries its type badge and a plain-language disclosure. What it never changes: no operator of any type can pay for a listing, a rank, or a type.
We name names, including listings we've removed.
When we exclude a center, we don't quietly drop it. The exclusion is logged on our top-list page with the date and reason. We preserve the archived URL so the page doesn't 404. Anyone who linked to or bookmarked the listing still lands on a page explaining what happened.
The most common exclusion reasons we've seen: domain expired without renewal, the site no longer shows FBA-prep services, or persistent seller-forum complaints we couldn't resolve via the center's stated process.
What you can expect.
- Nothing is for sale but clicks. Rankings on our top-list are editorial. Centers can pay us per click we send them, and any Featured placement is clearly labeled on the entry and at the top of the page. Neither buys editorial ranking, a shortlist pick, or verification. A Featured center on a shortlist receives the seller's details when the seller asked to be contacted. That is the only thing payment changes, and it happens after the pick.
- No fake ratings. Our
LocalBusinessJSON-LD never includesaggregateRatingunless real reviews exist. We won't pad SERP rich results with fabricated star scores. - Verification stays verification. The 4-check battery above is run on every published listing regardless of featured or sponsor status. Failures are visible on the profile.
- No tax advice. Pages about tax-free states explain mechanics. They do not substitute for a CPA.
See our coverage breakdown for the full universe we track (verified + pending + excluded) and per-state density. Operators running an FBA prep operation can apply to be reviewed.
You do not have to run these four checks yourself. Tell us your product, monthly volume, and channels, and we reply with up to 5 verified centers that fit, each with the last-verified date and per-unit pricing you would otherwise chase down. Free, no account needed.
Get matched to verified centers →Related references.
Switching FBA prep centers
What a seller should do when the operator behind a listing stops answering, and how the verification date reads in that moment.
Read the runbook →
FBA prep verification study
This standard applied to every competing directory in the niche, with the results published.
Open the study →
What we track and verify
The live roster this method produces: tracked entities, published centers, verification status.
Open the coverage report →
Our Amazon Seller Central connection
What data a connected seller account exposes to us, what we do with it, and how long we keep it.
See the data handling →
Apply to be reviewed
What an operator has to produce from primary sources to clear this standard. Listing is free.
Open the application →