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# Omnichannel Integration: What to do with anonymous user transactions in our system?

Sometimes we find transactions generated by anonymous users who do not have a unique identifier in our system. In this article, we'll explore how best to address this situation and ensure that each customer is correctly linked to their orders in the context of omnichannel integration.

### The importance of linking customers and orders

Our omnichannel integration process requires that each user or customer have a unique identifier that allows us to link the customer reported in the customer file, with the order listed in the order file. In the case of e-commerce transactions generated only with an email that do not internally generate a User ID within the system of origin, use the email as UserId, and duplicate the data in said field and in the email field.