In a properly addressed envelope, the stamp should appear in the upper right hand corner and the return address on the left upper corner. However, I often receive mail from overseas where the stamps are pretty much just slapped on anywhere, so I guess you could take a chance on it. I wouldn't try it myself though. Your letter may not get to its destination.
Stamps are to affixed. Stamps are to be cancelled. The convenience could be the reason.
Upper right hand corner on the side you write your message on.
A stamp is typically placed on the right side of a letter for uniformity and consistency in postal processing. Placing the stamp on the right also helps the postal service quickly locate and process the mail for delivery.
A stamp because it sits in the corner of the envelope and then it gets posted somewhere on the other side of the world!
Stamp
you go on your stamp album
perforations
The appropriate location for the notary stamp is to the side or immediately underneath the notary's signature. The stamp should never be above the signature.
I would say B is the tail pipe end.
When addressing a side flapped envelope the side flap should be to to the right - regardless as to whether the person is addressing the envelope is left or right handed. So the postage stamp is on the same side as the opening flap.
In proper postage etiquette, the postage stamps is supposed to be affixed to the upper right hand side of the front of the envelope. The address should be in the center of the envelope, and the return address in the upper left hand side.
The first Christmas stamp appeared in Austria and showed a vase full of roses. The signs of the Zodiac are seen in the side-borders of the stamp.