Probably not a true story but here is goes…
When I was in Eretz Yisroel I volunteered to go collecting before before Pesach. There were strict rules- we had to be dressed in Shabbos clothing, we always had to be with a partner as well as the common sense rules.
Then the guy in charge told us a story about one guy whose collecting partner had to leave and he continued the route on his own. At one house the couple invited him in to sit down, asked him to say a Dvar Torah, have some cake and a drink- then asked him if he’s ready to meet his daughter…
In subsequent years the story got better and better. This time there was a knock on the door during the Dvar Torah, the father asked to be excused for a second, slipped the guy at the door a 50 Shekel bill and then returned.