kd1403 said:nkm:
This is what my attorney had told me since when i saw a washington dc postal stamp on my P4 envelope last year I had asked my attorney why washington dc stamp AND also i had read something similar either on murthy forum/ ron gotcher forum. The way it was explained ot me is that the US consulates mail all P4 to respective country consulates/ embassies in usa. So indian P4 goes from an usa consulate in india to an indian consulate in usa, russian P4 goes from a usa consulate in russia to a russian consulate/ embassy in usa and so on.
P4 packages are sent from US consulates abroad in a diplomatic pouch along with other stuff. I think diplomatic mail is hand carried. They are received and sorted at a central facility, possibly in Washington DC. P4 then get mailed thru USPS from that facility, that is why you see a US postmark on the envelope. I don't think foreign consulates in US get involved at all.