Fear not, we have you covered.
It is quite an easy process, but the stars do need to align in order for it to be completed properly.
The first thig you will need is your GS1 certificate, which shows that you own the UPC prefix.
You will get this from www.gs1.us.org , you should be able to download it at any time. If you do not own your UPC prefix, you will need to contact the person you retrieved or purchased your UPC codes from in order to generate the certificate. The GS1 certificate proves who the prefix is registered to, this is why Amazon wants to see the GS1, so they can verify you own the existing UPC tied to the ASIN, therefore are authorized to make changes relating to the product UPC.
Once you have this, you now can create a case inside vendor central in order to make this change.
It cannot be done from inside the Catalog Manager because it will be a locked field.
The most important part of this process is the fact that you HAVE to create a product outage in order for this process to be successful. So be sure to visit 'Reports' then 'Retail Analytics' then 'Inventory' and check how many units are in stock, and how many are in open order.
Once you understand how many are in stock, you will want to change the availability status inside the Catalog Manager on the ASIN to Temporarily Unavailable and begin rejecting any PO’s for this item. Assuming this item is not overstocked, expect 4-8 weeks to go by before the item is completely drained from their system. It is important to get the stock to 0. This is crucial because the retail inventory cannot have more than 1 barcode mapped to an ASIN. This is why your previous attempts have likely been failing. If Amazon were to accept a barcode change, the preexisting inventory in the network would have an Identifier no longer tied to the ASIN in question.
Step #1 Navigate to 'Support' then 'Contact US' Step #2 Select your Business Group Step #3 Select “Manage My Catalog” Step #4 Select “Item ID Update (EAN, SKU, UPC, Model #, ISBN)” Step #5 Select “Still Need Help” and Then “Send an Email”
Fill out the form in its entirety, attach the GS1, and tell them you need to make a mandatory UPC change. Provide a link to the item from your website as website proof that you are the owner. Tell Amazon the UPC has changed, it’s out of stock. Hit Submit.
You should get a response back from Amazon that the change will be live in 24-72 hours and will reflect on the next PO cycle.
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