I would like to request/suggest adding a line to the existing checkout screen ...
I have multiple instances where customer enters the incorrect email address in the checkout form. Therefore they do not receive their receipt, nor shipping confirmation email. This is a daily issue and leads to customer upset, and additional time looking up customer information and manually sending.
I think it would be highly beneficial to have the customer enter their email address twice in the checkout screen to eliminate error and alert of any typos.