Be able to send reminders about a single bill
I'm able to send email reminders about expenses within a group.
But, if I add an individual bill split between people, I'm not able to find an option to send a reminder. Neither can I send a reminder to a person on the consolidated amount he/she owes me across multiple groups and/or bills.
Sorry, I think you just haven’t found the place for it. Click on the “settings” gear on the friend page, and then hit “send reminder” from the list of buttons on the right hand side. It’s a bit hidden (sorry) but it’s there.