It is tradition to start with. When things were all handled manually, it really didn't matter. But the creation of automated machines to handle and speed mail makes it important to place them in the right place. Otherwise they can will be rejected by the machine. Then it has to be handled by hand and it slows down delivery.
do you need airmail stamps put on letters from australia to england
no reason
yes
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.
There is no hidden code here, it just means he wasn't paying attention and could have been in a rush when he put the stamps on the envelope.
british stamps
it is the collection of stamps & used in posting letters.
Yes, they needed them for letters.
Yes
No, stamps on letters can be quite different, they differ in two main ways, the value of the stamp, each value may be a different colour and/or design, and the country producing the stamps will have it's own unique design from others countries.
no u cant.!
Stamps that represent a tax put in place but the state of which it is sold. Most stamps are transfered by means of heat.