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.
Business concerns often stamp incoming mail. Some post offices also stamp incoming mail, particularly those that are being tracked. This establishes that the item was received on a specific date. This type of documentation can have legal value in establishing delivery.
The delivery service will only deliver letters which the senders have paid to have delivered. Teh stamp is your receipt and shows that the letter is 'legitimate'.
The purpose of stamping envelopes is because each stamp is a payment for the letter to be mailed. It is a way for paying for the mail and post offices for delivering the mail.
To pay for the cost of delivering it.
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.!
I mail my letters with 5 cent stamps from the 60's.