General Information

You do not need a Temporary Resident Visa to visit Canada if you are from a visa-exempt country. Citizens from all other countries must apply for a Temporary Resident Visa before entering Canada.

Listings of visa-required countries and visa-exempt countries:
http://www.cic.gc.ca/english/visit/visas.asp

More information:
http://www.cic.gc.ca/english/visit/index.asp

More information:
http://www.cic.gc.ca/english/visit/index.asp

Traveling to Canada from the U.S.

All U.S. citizens traveling by air outside the United States are required to present a passport or other valid travel document to enter or re-enter the United States.

Canada specific information for U.S. citizens:
http://travel.state.gov/travel/cis_pa_tw/cis/cis_1082.html

More information for U.S. citizens:
http://travel.state.gov

Letters from ACM

International registrants should be particularly aware and careful about visa requirements, and should plan travel well in advance. All visa support inquiries must be handled by ACM headquarters.

Please note that ACM does not issue formal "letters of invitation" to any of its conferences.

Please send your request for a letter in support of a visa application to the Office of SIG Services
() at ACM headquarters:

Your request must include:

Name as it appears on your passport
Residence address and a ship-to address if different
The name of the conference you wish to attend
Registration confirmation number
If you have any papers accepted for the conference, please indicate whether you are the sole author or a co-author, and provide the full title of the paper
Fax number

Please Note: Visa Support letters are not issued via email.