The documents required for a Canada transit visa are as follows:
- An original passport with a minimum validity of 6 months
- A fully filled transit visa application form
- Copies of the latest passport-sized photographs
- Family Information Forms (IMM 5645 or IMM 5707)
- Proof of travel itinerary
- Letter of Invitation (if required)
- Information about the connecting flights
- Proof of medical insurance
- Criminal clearance certificate