I've moved to a new location, but don't want my terrible former roommate to find my new address. I've noticed that a copy of a change or address confirmation goes to the old address. Is there a way to prevent this from happening? (This question regards the US postal system.) (USPS calls these notices 'Move verification letters.) Although it is a violation of federal law, my nosy former roommate would definitely open and read it, and probably show up unannounced for an unwanted visit.)