Since March 15, 2016 all non-citizens require a Visa or Electronic Travel Authority to enter Canada.
An eTA is an electronically stored authority for travel to Canada.
All visa-exempt foreign nationals are expected to have an eTA to fly to or transit through Canada. Apply online
Citizens of some countries cannot enter Canada without a valid visa. You can apply for a visa online.
If you need the official invitation letter, please send a request to Kornelia Streb with the following information:
1. Full Name (exactly as in your passport)
3. Passport number
4. Your affiliation
5. Present occupation and title
6. Name of Country where you will apply for the Visa
7. Full postal address
8. E-mail address
9. Telephone number
10. Fax number
11. Paper title
12. Your registration must be fully completed (proof of registration and fee payment must be received)
(Note: all above information must be provided for each traveller, regardless of age)