Option #1: ✉️ Send them a letter
It is possible to generate those helpful reminder emails as a letter for this very situation.
Locate and open your customers Job Address.
Under the details, click on the "Customer Reminder Letter" button.
You can then print the PDF that is shown.
Fold the paper, pop it in an envelope and give it a stamp.
Note: Our software isn't quite advanced enough to post this for you.
Option #2: 📱 Set up automatic SMS text reminders
If you have a contact number, the software supports the use of text messaging. These are sent automatically in the same way emails are.
There is already a whole page on how to do this. I'll just leave a link here for you.
How Do I Setup SMS Reminders?
Option #3: 📞 Give them a call
Call me old fashioned, but sometimes picking up the phone is the easiest option.