There are dozens of solutions to this. City officials are never going to outsmart Google, et al. My favorite, courtesy of Heinlein: On each side of the door

There are dozens of solutions to this. City officials are never going to outsmart Google, et al. My favorite, courtesy of Heinlein: On each side of the door was a huge brass bowl — filled with money. More than filled — Federation notes of various denominations spilled out on the floor. He was staring at this when Patricia returned. “Here's your drink, Brother Ben. Grow close in Happiness.” “Uh, thanks.” His eyes returned to the money. She followed his glance. “I'm a sloppy housekeeper, Ben. Michael makes it so easy, cleaning and such, that I forget.” She retrieved the money, stuffed it into the less crowded bowl. “Patty, why in the world?” “Oh. We keep it here because this door leads to the street. If one of us is leaving the Nest — and I do, myself, almost every day for grocery shopping — we may need money. We keep it where you won't forget to take some.” “Just grab a handful and go?” “Why, yes, dear. Oh, I see what you mean. There is never anyone here but us.”