The address verification is definitely tricky. I brought my letters from bank and and property tax postcard. One says Apt, one says #, the lady firmly rejected them because that's not the same address according to her. I was lucky to have another one showing Apt and she accepted it. I'd imagine a normal person would understand there is no material difference between the two and most of times, whoever sends those letters has their own address formatting system to show the "correct" address in their mind.