Yes, businesses are entitled to request that customers sign a waiver/indemnity. From the business’ perspective, a waiver/indemnity is important to protect itself in the event that customers with severe allergies have an allergic reaction, despite the business taking reasonable precautions. Although a serious allergy that causes anaphylaxis can be considered a disability under Anti-Discrimination legislation, it is likely that requesting a waiver/indemnity be signed is a reasonable requirement and would not be discriminatory.