World Congress of Dermatology > Visitor Information > Entering Canada – Visa Information > Visa Frequently Asked Questions Visa Frequently Asked Questions Who needs a visa to come to Canada? Do delegates also need a visa or other travel document? What documentation is required for children traveling to Canada? Do delegates passing through or returning to the U.S. require special documents? How do delegates apply for a TRV? Do delegates attending an event or meeting need a letter of invitation to apply for a TRV? How long will it take for a TRV application to be processed? How much does it cost to apply for a TRV? How can delegates check the status of their TRV application? What if a delegate’s application is refused? Will any of the delegates require a work permit?