A reason why Amazon rejects ASIN merges.
By Vanessa Hung · July 22, 2026 · Curated by George's Blog
A reason why Amazon rejects ASIN merges.
You know I talk a lot about always having a GS1-certified UPC, well, imagine you are correcting old UPCs because your barcode got flagged (yup, that happens), and you create a new ASIN using a GS1-issued code, and the plan is to merge the old listing into the new one so the reviews carry forward, but Amazon doesn't allow you.
That is what we show you how to solve in this week's newsletter, because if the attributes line up (model number, UPC, item count, part number), Amazon will treat the two ASINs as one that can be merged, but what if you have two UPCs for one product?
In this case, there was no issue with attributes themselves, it was more about who contributed, how Amazon identifies one listing from another, and how that affects your listing when we talk about merging and variations.
Because when the seller tried to do the merge it was rejected but it had nothing to do with the data submitted.
It all went back to a record linking Amazon as a seller of that product, which had also at one point held contribution rights for that ASIN.
Once that record exists, the request moves from a catalog fix into an ownership question, and Amazon's rejection message never says which one you're actually facing.
So we ended up finding the one structure Amazon's system still allowed, one that let the seller keep the reviews and retire the old ASINs without carrying more issues.
So before scoping any merge, check this week's newsletter to see if the tools are even available to you, before any time goes into fixing attributes that aren't the real blocker.
Case #031: https://lnkd.in/eWr8ZztD
If you're having a hard time with this or any other Amazon issue, DM me! We can take it off your plate.
#AmazonSeller #ASIN #Ecommerce #BrandRegistry #CatalogManagement