4x6 envelopes are considered business type mail and therefore do fall under the acceptable size for a regular stamp. Beware that some post offices do have different regulations.
NO, they have to be an already stamped envelope from the post office
A 1099 form, mailed in the required envelope, should be stamped with a regular first class, one ounce, stamp. As of 2014, a first-class stamp is $.49.
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.
Its called a stamp square or stamp window.
Just one stamp if it's a regular letter. A forever stamp will get the job done but if it weighs more than the a regular letter, you may want to stop by the post office and get it weighed first
On envelopes with a flap end, the stamp should be placed on the upper right corner of the front side. This positioning ensures that it is easily visible for postal processing. The flap should be sealed down, and the stamp should not obstruct any addresses or other important information on the envelope.
The Post Office. Stamp Collectors. Stamp Dealers.
Not necessarily. Many stamps are valued for their cancellations and sometimes the envelopes they are "tied" to.
47 cents, or one Forever stamp for the first ounce.
To cancel the stamp so that it can't be used again.
From a Poat Office From a Poat Office
As of this writing (June 2009) it is 44 cents. Check with the post office web site for current cost.