If the company or in this case, the govt, needs something that bad, then they could provide a special address where the real employee (who can take the responsibility to sign to receive it) works. Nearly all companies use PO Boxes these days and nothing can be signed for with a PO Box either. I understand why she wanted to send it like she did - as I would be mad about them losing my records as well.
In my 32 years, I believe I had to have a customer do that twice. Extremely rare. The company I worked for really frowned on it - as they didn't want the street address out there, coz its gets spread and then customers start showing up at the door. Heck, I even had customers call my home at a couple of times. When that happened it always freaked me out. We had our own internal security and holy cow, you do not want our security on your butt.