Anyone had any success getting SN from DMC held for pickup?

[TangentiallyAlive]

I'm looking into getting SN from DMC and requesting that it be held for pickup, but due to the nature of my situation, the stakes are very high if it gets declined & delivered to my house. A user told me that DMC uses USPS for deliveries to the US, but I am afraid that USPS may decline my hold for pickup due to it being a delivery from outside the country or something like that. I've thought about putting the address as the post office's address & "HOLD FOR PICKUP - (my name)" as the second address line, but I'm afraid that USPS may reject that. Has anyone done this successfully?