It depends on the time frame of the stamp. If there is a special cancellation, you definitely want to leave it on the cover. The older the piece, the more likely the cancellation and date will be of value.
A stamp . . . as on an envelope or postcard.
It depends a great deal on the stamp and how old it is. If there is a special cancellation or cachet on the envelope, it is better to keep it on the envelope. The older the stamp the more likely that the envelop will have more value than the plain stamp. It is better to leave the stamps on the envelope because there is a postage mark that goes over the stamp. That will give the stamp more value.
a metered postcard is a postcard that already has the stamp made into the the postcard. there is no need to put an adhesive stamp on it.
Many envelopes will have a box in the top right corner which says something about the postage. If does not have that, you usually place the stamp in the top right corner of the envelope. If you have issues, then you should go to your Post Office.
on the envelope.
Usually, postcards have a (place stamp here!) In short, this is where the stamp should be placed!!
Yes, you can use a Forever stamp on a postcard, but it's overpaying for postage.
In normal use the stamp goes on the back of the picture in the upper right corner. Place it like you would on an envelope. There are time when for collecting purposes a stamp is placed on the front with the picture and canceled. There are normally created by collectors for display.
cost of airmail stamp on a postcard from usa to south Africa?
If you are talking about cutting out the postcard stamp area, and sticking them on an envelope or a package, I think it is the same in theory as cutting stamps that were stuck to a letter, unused, and glue them to another letter to use. I am also trying to find if there is some restrictions, because if I can use the old postcards, that is unused postage. Postcard stamps can also be used in stamp collecting. They can be used to stamp anything, such as letters. Stamps are like money and they have to add up to the current postage, that is all.
A postage stamp.
Probably the amount of a stamp, or less, depending on how heavy the postcard is. But A stamp would work just fine.