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
There are organisations like GS1 that companies register with. They give your company a unique identifier that you have to use as the start of every barcode. After that each company can put their product code. [https://www.gs1.org/](https://www.gs1.org/)
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