Retail Arbitrage/Wholesale sellers, do you cross out barcodes?

Do you cross out the manufacturer barcodes when you process/bundle the items?

I remember this being a rule when sending in products, but I think this is a ‘soft’ rule…I’ve sent in products with the barcodes unmarked and never been notified.

I would think their warehouse system detects the ASIN label, and not tag the manufacturer barcode.

If this isn’t enforced then I’m wasting time crossing barcodes out