We want let customer create card using Square SDK on our mobile app. However, we found that the Square default UI components don’t require customer to input their address. Is it the expected behavior, should we add custom UI to require the address? We don’t use the address info for other use cases.
When creating a customer at least one of given_name, family_name, company_name, email_address, or phone_number is required for a customer. 
I mean creating card for a customer.
POST /v2/cards
Yeah, this is expected and you can create a customer card on file without the information.