Hello,
My apologies for the late reply. Usually I aim to reply within 24 hours on business days.
This is not a bad idea. But if the user can save and delete contacts, then that complicates both the plugin’s API and the user experience.
Instead, I’m thinking that perhaps the plugin could simply look at past outgoing transactions for this user and auto-suggest the ones that are most recent or most frequent. Clicking on the field would display the available options or the user could still enter a different username or email.
What do you think?