AUGUST 15-19, 2011


Visa Information

Depending on where you live, and the reason for your visit, you will need to meet certain entry requirements to be admitted to Canada. All persons, including U.S. citizens and children traveling by air between the United States and Canada, are required to present a valid passport at the border. For other countries you may additionally need to obtain a Temporary Resident Visa. A list of countries for which a visa is not required includes:

Andorra, Antigua and Barbuda, Australia, Austria, Bahamas, Barbados, Belgium, Botswana, Brunei, Croatia, Cyprus, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Israel (National Passport holders only), Italy, Japan, Korea (Republic of), Latvia (Republic of), Lithuania, Liechtenstein, Luxembourg, Malta, Monaco, Namibia, Netherlands, New Zealand, Norway, Papua New Guinea, Poland, Portugal, St. Kitts and Nevis, St. Lucia, St. Vincent, San Marino, Singapore, Slovakia, Solomon Islands, Spain, Swaziland, Sweden, Slovenia, Switzerland, United States, Western Samoa.

There are many other cases in which a visa is not required. For instance, British citizens, and British Overseas Citizens who are re-admissible to the United Kingdom do not require a visa, nor do United States permanent residents (Green Card holders) who can produce their alien registration card in addition to their passport.

For a detailed list of countries and requirements, please refer to the Citizenship and Immigration Canada web page.

Students holding a single-entry visa in the U.S. should take note that if you plan to attend the conference, you will need to re-apply for a U.S. visa in order re-enter the United States at the conclusion of the conference. These students are advised to begin applying for U.S. visas as soon as possible.

Documents you must have at the border into Canada include:

Support Letters

Requests for visa support letters for purposes of attending or presenting at SIGCOMM 2011 are handled by ACM.

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

Please send your request for a letter in support of a visa application to You must include:

  1. Your name;
  2. Your mailing address;
  3. Your fax number;
  4. The name of the conference you are attending (i.e., SIGCOMM 2011); and,
  5. If you are an author of an accepted paper or poster, please provide the title.

Once the information is sent, ACM expects to issue the letter within a week. Please note that ACM does not issue formal "letters of invitation" to any of its conferences, only Visa Support Letters.