@SusanY1
Sorry for bugging you again. I should have realized that USPS actually has delivery services that has tracking like Priority Express which I think is enough to send such sensitive forms and I plan to use USPS Priority Express
in this case since it’s not a private delivery service, i believe I should send my 3520 to the PO Box 409101 in Ogden, UT 84409 like normal right?
