Include payment link in deposit receipt email and invoice email
When a customer pays a deposit and has a remaining balance due they should receive a link they can use to pay their remaining balance. This should be included in their deposit receipt email as well as the invoice email.
Gray Ayer commented
at the very least, they should have a "pay now" link on the emails that they do get, which current as of 4/26/2017 seems to be missing.