Do I have access to customers' names and email addresses once they've purchased something from me?

[paradigm]

If so, where do I find this information? 

Thanks,

Peter

[VanKalkerFarms]

If you add a customer using the customer directory part of Square you will have access to all the information that you add to that customer.  If you only swipe or dip their card you will have limited to no information depending on the card used.

https://squareup.com/help/us/en/article/5532-manage-your-customer-directory-from-the-square-app