In a checkout process, I need to show an option for the user to save their payment method info, to pay faster next time. Only registered users can save this info, so if a user wants to save they either have to sign in or create an account. The checkout form is a single form, no steps.
Two options come to mind:
- After the user enters payment info, before sending to payment. This will trigger a modal window to sign in or register.
- After payment is processed, on the success screen.
There are pros and cons to either of these, but i'm curious to hear what you think.