Depends on how many pages the letter is; an average letter, say two pages - one stamp.
Your answer depends on the size and weight of the letter you want to mail. You can use the online calculator, below, from the USPS, to determine the value in stamps required to mail your letter.
one
First Class Mail is delivered in three to five days.
All you need is ONE first class postage stamp. Provided that it's only a letter.
what the price to mail letter to
how many forever stamps = .94
5
No, the postman will ignore it. Go get stamps.
Stamps show that you have paid the money to have the letter delivered.
maybe 2 0r 3 stamps
typicaly 2 stamps
No, you must use US postage stamps.