Amazon Listing Merge and Split: When Catalog Problems Happen

Amazon catalog merges and splits happen when Amazon's automated systems detect similarities or differences between ASINs and restructure the catalog accordingly. Catalog merges (two products combined into one ASIN): this is a serious problem because the reviews, sales rank, and content from both products get combined. Buyers may receive the wrong product while seeing reviews for a different one. To report and request a split: open a Seller Support case with both ASINs and clear evidence they are different products (different images, packaging, specifications). Provide the manufacturer's documentation showing they are distinct SKUs. Request an ASIN split. Include a timeline -- merge cases can take 2-4 weeks to resolve. Catalog splits (one product split into multiple ASINs): less common, but can happen to variation families where Amazon reclassifies variations as separate products. This splits your review pool and disrupts your variation structure. Escalation path: if the initial Seller Support case does not resolve the catalog issue, ask to escalate to the catalog team. Brand-registered sellers can use the Brand Registry support path, which often reaches more specialized catalog teams. Persistence is required -- follow up on open cases every 3-5 business days. Document all case numbers and communications. Temporary mitigation while waiting for resolution: update your listing content and images to be as clear as possible about what the product is to reduce customer confusion.