Here are the steps that I had to take to register and get a plate for my mobylette cady in Ontario. Hopefully this will help ease the pain for someone else trying to get through this process at Service Ontario and will save you a lot of grief.
1. Have a bill of sale from previous owner which includes the following:
Name of seller; name of purchaser; price if any; any identification available from bike (serial number, motor ID number, ideally the VIN if available - Mine did not have a VIN plate anywhere on it which caused a lot of chaos). I also brought along with me pictures of the bike and the pictures of the numbers I was using as identifying features.
2. Complete a hand written declaration as follows:
I, John Doe, purchased a moped for $10 from Bill Smith as is. The moped was never registered to the best of our knowledge under the HTA and did not have a NVIS. It is defined as a moped under the HTA.
Serial Number: ____
Motor 49CC # ____
Made in 1975 - Motobecane Cady
Colour Yellow - Single Seat
Sign it including your Drivers Licence Number & Date
3. Also, they should have you complete a Self Declaration of Ownership Form # SR-LV-065 09-05 available from ServiceOntario.
My total cost was $53.55 for a two year plate and HST.