Once there are any customer-complaints on a given SKU then co-mingling is deactivated. Later, sellers attempting to co-mingle inventory are provided a seller-s

Once there are any customer-complaints on a given SKU then co-mingling is deactivated. Later, sellers attempting to co-mingle inventory are provided a seller-specific SKU that is matched to the parent and they're required to use. This ties all issues on their orders back to their store. This still requires lots of human intervention, which sucks.