[Harmless Teddy Bear]

For a citizen, no. Which is to say they can do it but they won't.

They will do it for a court order. Doubt you could get one though.

Never ever send anything to the government, federal, state or local without a tracking number and a signature requirement.

Yes, it will cost you more but at least you can prove you sent it.

Sending it electronically if you can will also create a trail.

Sadly fax is usually not possible any more.

[Dr. Franklin]

For a citizen, no. Which is to say they can do it but they won't.
They will do it for a court order. Doubt you could get one though.

If needed, I could well ask for a court order to track the letters. If the USPS delivered the letters, and some worker in a government office then destroyed them, that's a crime.