Yes, pre -inked, says "Your windows were cleaned on........./.......... 2011
Collecting on ......./......./..........
RPG Service
It's one of those square ones that you can change whatever you need. I use the 4 inch post it notes with one sticky edge to stick just above the key holes of the doors so the custies can't miss them. I'm old school, so I collect and knock doors when I look for new custies.
I give out PayPal or bank details to custies who I trust to actually use them, otherwise "In God we trust, everyone else pays cash"