My wife's investment broker moved from one brokerage house to another. They were very insistent that she needed an address other than our PMB. It took awhile but providing mail from SS administration, Medicare billings, they finally decided if her/ our address was good enough for the Federal Gov it was good enough for them.
Remember the government works for us, not us for them. Two thousand page pieces of legislation are written by bureaucrats only concern is to keep their direct deposits coming.