This area is regularly updated, and the questions below are organised in the order of popularity.
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How to use your barcodes
Tips on how to get the best use of your barcodes.
I'm not based in the UK, can I still join GS1 UK? | Can I reuse barcode numbers allocated to me? | Can a product have more than one GTIN? | Why do I have to have a new Global Company Prefix (or GCP) when I get a new batch of numbers? | Can I buy GS1 numbers and sell them on to others? | How do I find out who owns a GTIN or barcode? | What’s the difference between a barcode from GS1 and others I see online?
Amazon and selling online
Answers for those selling on Amazon marketplace and online.
Why are my GTINs not being accepted by Amazon? | How long does it take for my GTINs to be recognised by Amazon? | Can I use GS1 UK barcodes on Amazon websites outside of the UK? | I bought GTINs somewhere else, can I update my listing with GS1 GTINs? | Someone else is selling a similar product to my own and using my GTIN | Do GTINs help with search engine traffic?
My GS1 account
See solutions related to your My GS1 login account.
Where can I find my GS1 certificate? | How do I reset my password? | How do I manage account users? | How do I make a payment? | When I join how quickly do I receive my barcodes? | I've just become a member, how do I start using my barcodes? | I've run out of GTINs, how do I purchase more? | What is a barcode image credit?