How can I tell if the door-to-door individual is legitimate?

Our door-to-door representatives wear royal blue vests with our logo and website on the lapels, and a large Operation Smile Canada logo on the back. This makes them easily identifiable. Also, all our representatives have badges. It’s worth noting that some badges, designated as “training badges” for newer members, feature a silhouette instead of a photo. Once the training is completed, the representatives are issued badges with their photos displayed.