I'm literally buried in work on my end as I come from the island. It's recently come to my attention that Guam is actually De jure territory / Non federal zone/ unincorporated yet is under Federal Jurisdiction. I've been scratching my head a few days now. Trying to tell myself it's unincorporated, but looking from the inside it's all federal. I'm living an oxymoron state..crap is so Backwards.

The only thing that's truly free are the chickens/roosters/pigs that roam here. As we(islandwide) don't cage them, just let them do their thing.

To answer your questions, cause I've talked to locals about mail, bills, debt collection and so forth. The locals here simply do not respond to any mail. The IRS/ FEDS/ debt collection have no balls to come here to collect, they can call/emails -- and as residents we can hang up. They can mail, but the locals don't respond. Unless we "accept" to pay it or "settle."

Because Guam is a jungle we typically use PO Boxes, so they don't know where we live. This can be a good idea for privacy.

I do not know how the USA operates, but if you have a shieff in your county he should protect you if these scam artist came to your place.