From Go Transit's Lost & Found Page:
Call Us
416.869.3600 ext. 7273
Monday-Friday, 6:15 a.m. to 7:30 p.m.
Saturday-Sunday, 10:00 a.m. to 5:30 p.m.
Long Distance
During Call Centre hours, please dial 1.888.GET ON GO (438.6646), ext. 7273.
Email Us
[email protected] t.com
Please include: a detailed description of the object, when and where it was lost (train line, bus route, station, trip number/time, location on the bus or train, etc.), contact information and any other relevant details.