Contra Proferentum

Millennium Veterinary Hospital Corporation v. SR & R Bay Ridges Ltd., 2007 CanLII 28328 (ON SC)

[21] The doctrine of contra proferentum establishes that when words in a lease or contract are imprecise, then the interpretation most favourable, within reason, to the person who is not the drafter of the agreement must be adopted. City of Toronto v. Greenspoon Brothers Ltd., (1980) O.J. No. 3647 (Ont. C.A.).