Thank you for booking with the Four Points by Sheraton St. Catharines Niagara Suites! Individuals booking with the Brock Math Symposium are required to use a valid credit card in order to guarantee the reservation. Individuals who fail to arrive on the confirmed date without fourteen (14) days notice, will be charged at the group rate for their length of stay. Late arrivals may be charged for the confirmed stay at the group rate. Early departures will be charged 100% of room rate for the remainder of their confirmed length of stay