Buyer is in Saipan, it’s in the Mariana islands and technically a US territory, have to fill out custom forms, is signature required? It’s above $750, but whenever I try to buy a shipping label it gives me an error Buyer is in Saipan and it’s technically a US territory so I have to ship despite having my settings to USA only. The item is above $750, but I cannot ship using signature confirmation. 
USPS doesn’t support signature for international orders, and even though this location is 7000 miles away in an island, it’s still technically part of the us, but I can’t get signature for it, and I’m worried I wouldn’t be covered if I ship it without .
What do I do ? It’s a P.O. Box too, so only USPS is available