What if you go with a realtor but end up finding a place on your own

Is there any sort of fee or consequences if you go with a realtor for your rental search, but end up finding a place without them? Ex. the landlord doesn't want to sign a lease through a realtor because of the fees.

I'm starting to look for a place in Toronto and am considering going with a realtor, but evaluate all the pros and cons before I make the final decision.