Emailed payment reminders is what I mainly use under the main customer tab...click on which ones to send and type a note and send via email.
You might want to require a credit card on file going foreward...its much easier to just charge their cc. I used to mail out lots of very specific invoices monthly and used invoices with statements...just got tired of chasing money..even <30 day pays were sometimes 40 to 50 days after service was performed...
Moved to contracts and I don't have that problem
1989 BlueChevy 1500 Extended cab with FULL bed
1978 7ft Sears cargo trailer with added wood inserts to hold both my weedeaters
3 1976-83 vintage lawnboy lawnmowers with full self propel features as well as mulch kits
2 Sears electric weedeaters
1 green machine electric leaf blower
1 sears articulating hedge trimmer-electric
2 50ft power cords
3 Leaf rakes
1 pocket knife
cooler for beer
lawn chair to enjoy a beer while I wait for the cash to be handed to me