@Flick @HebrideanHecate @Ladyfat My grandmother would do that. Paid her rent in cash with exact change so "the landlord won't know that I have more money and raise the rent". She paid bills that had to be mailed by check, but otherwise only cash.

I found out when I went to run errands for her one winter and she asked me to cash her pension check. The bank wouldn't let me and would only deposit it (understandable since they had no way of knowing who I was and that I would hand her the cash). The teller told me that it was quite common for her generation to leave the bank with a lot of cash and that there were a few customers that they really worried about.