In 2010, the FBI criminal database was synced with the Royal Canadian Mounted Police criminal database, allowing the Canadian police to see if a U.S. citizen has a criminal record, according to Temporary Resident Permit. Canada denied entry to 6,948 Americans in 2010, states Ezbordercrossing.
Serious offenses make a person inadmissible to Canada regardless of when the crime occurred. A person is also likely to be denied entry for having a warrant out for arrest, have pending charges or having a trial in process, states Ezbordercrossing.
If a person is denied entry to Canada due to a criminal record, the person must obtain permission from the Canadian government in order to enter the country, Temporary Resident Permit explains. People with criminal records who want to enter Canada need a Canadian Temporary Resident Permit. A TRP allows people to cross the border for a limited amount of time, from a single crossing for up to three years.