How supermarkets make sure all barcodes are unique?

Question

Since the barcodes are coming ftom the manufacturer how you can make sure they are all unique? With you scan a product you need to make sure it’s unique

In: Other

Answer 1

[https://en.wikipedia.org/wiki/GS1](https://en.wikipedia.org/wiki/GS1)

There is an organization [see above] which coordinates the standards at all levels of the supply chain which was created for this very reason.