Amazon Tightens ASIN Creation Rules: What the June 2026 Policy Update Means for Sellers

Alexa Alix Last Updated: May 29, 2026 4 minutes read Amazon is drawing a harder line between authorized and unauthorized sellers with a significant update to its ASIN creation policy, effective June 1, 2026.

Under the new rules, vendors in the US store must hold a formally assigned reseller role through Amazon Brand Registry before they can create new ASINs for any brand enrolled in the program.

For the thousands of third-party sellers who have long operated in the gray space between legitimate reselling and unauthorized listing, the change is a direct and pointed challenge.

What Changed — and Why It Matters Previously, Amazon's existing ASIN creation restrictions applied broadly to sellers without brand-assigned selling roles, but enforcement was inconsistent and the policy scope left room for interpretation.

The June 2026 update extends that restriction explicitly to vendors — a category that had, until now, existed somewhat separately from the standard seller framework.

The policy rationale is straightforward: brand owners, Amazon argues, are the authoritative source of product information, and the shopping experience suffers when unauthorized parties introduce listings that may be inaccurate, outdated, or simply unchecked.

When brands enroll in Amazon Brand Registry, they can add third-party sellers and vendors as authorized sources by assigning them a selling role — either a Brand Representative role for internal accounts, or a Reseller role for external distributors and partners with a formal selling agreement. That Reseller role is now the key to the gate.

It can be manually assigned by a brand Administrator to distributors, manufacturers, or others who have a selling agreement with the brand and an Amazon selling account. Without it, creating a new ASIN for a Brand Registry-enrolled brand is off the table entirely. Enforcement Is Already Underway This policy shift didn't arrive without precedent.

An early and highly visible example was a mass deactivation of LEGO listings, where products from the well-known brand were removed simultaneously in the US for all sellers with active offers.

Amazon justified the action by citing violations of its ASIN creation policy and explained that the platform now limits the creation of new product codes for brands enrolled in Brand Registry — a move that particularly impacted sellers specializing in discontinued products, even those who had previously obtained approval to sell.

Seller community threads have since reflected the confusion and frustration this kind of retroactive enforcement creates.

In several cases, sellers reported receiving deactivation notices for ASINs that had existed for years — listings they had simply found on the platform and sold against, unaware that the original ASIN creator may not have had the authority to list them in the first place.

The core complaint: there is no visible way for a seller to verify whether an existing ASIN was legitimately created. That ambiguity is precisely what Amazon is now trying to eliminate. What Sellers Are Being Asked to Provide For sellers who receive a deactivation notice linked to this policy, the documentation path is clear but demanding.

To keep or reinstate affected listings, sellers are generally required to produce either a Letter of Authorization (LOA) from the brand directly, or invoices sourced from the brand or an authorized distributor — both serving as proof that the seller is operating within a sanctioned supply chain. Sellers without that documentation face listing removal.

Those with FBA inventory on affected ASINs may need to arrange removal orders to avoid disposal fees.

The broader checklist for sellers navigating this update: Audit your catalog for any branded ASINs you or a previous seller created without explicit brand authorization Confirm whether those brands are enrolled in Amazon Brand Registry Gather authorization documents or invoices from the brand or authorized distributors Request a formal reseller role assignment from the brand through Brand Registry Proactively remove at-risk listings before enforcement actions trigger account health consequences The Bigger Picture: A Brand-Controlled Marketplace This update is not happening in isolation.

It is the latest in a series of moves Amazon has made to hand brand owners greater control over who can sell their products and how. Brand Gating already allows Amazon to restrict who can sell certain branded ASINs, requiring unauthorized sellers to request approval or provide invoices before listing gated products.

Meanwhile, starting in spring 2026, Amazon also mandated Brand Registry for sellers wishing to use manufacturer UPC barcodes with FBA — meaning resellers without Brand Registry enrollment must now use Amazon barcodes for each FBA unit. Taken together, these changes represent a structural shift in how Amazon operates. The open catalog model —