Only if mailed from England to the US. You can't mail in the US using a foreign stamp, but must have US postage.
What catalog do you recommend as a price guide for old foreign stamp prices?
No they are not valid for use in the United States. You must use stamps of the country of origins when mailing something, in this case, the US.
No. When mailing items you use the stamps of the country of origin.
Yes, that is how it would work. You use the stamps of the country in which the package or letter originates. The Universal Postal Union sets the standards and coordinates the transfer.
You use the stamps from the country of origin. So if you are mailing a letter from the US to Australia, you use US postage.
No you cannot use US stamps. Items mailed must have the stamps of the country of origin on them. Most shops will be able to provide you with the appropriate stamps to use to mail with their cards, or visit their post office!
Lincoln
No, you have to use stamps from the country of origin of the mail. In this case you will have to use Italian postage stamps.
No, the United States Postal Service does not sell foreign postage. The reason is that postal policy specifically says that if you are mailing something from the United States to a different country, you must use US postage. Post offices will not process mail with foreign postage on it unless it is coming into the USA from a different country. So there is no reason for the USPS to sell foreign postage for this reason. Answer: The USPS actually has to accept foreign postage from any country through which the mail piece is going to travel. This is guaranteed by the Universal Postal Union (UPU) agreement. The UPU is a UN agency that regulates the price of International postage. If you use foreign postage stamps when mailing something to the country that issued the mail, then your mail will be shipped there and the foreign country pays the USPS. If your local post office rejects the mail piece with foreign postage, then you should let them know that such refusal is in violation of the UPU agreement and possibly other law between the Nations. While I lived abroad, I have often seen British and German postage meters/stamps on letters from the IRS.
When you are sending mail internationally, you use the stamps of the country you're sending FROM, not the country you're sending to.
That is what stamps are for, to pay postage. In the US you buy postage stamps and put them on mail to any other country in the world.