The Providing Appropriate Tools Required to Intercept and Obstruct Terrorism Act of 2001 (aka Patriot Act) predates my going fulltime (in 2011) by 10 years.
My insurance(s), credit union, cell phone bill, pension, credit cards, yadda, yadda, yadda - all got changed in 2011 to my PMB.
My drivers license is the exception. When I went to change the address I presented the clerk with my cell phone bill (with the PMB syntax in the address). She tried to use the PMB syntax and the computer system would not recognize it. So I said "What about using the # sign?" She said "Yup, that works."
For me the take away was: if PMB doesn't work, use the # sign. If that doesn't work, use Apt #. Apparently, other than the USPS it matters little to everyone else.
