I know in many countries the function of the Post Office is restricted to delivering the letters, documents , parcels and money by charging some charges.
But in India the Post offices have some other additional functions with them out of which the banking is very important one.
The Post Office is Government Organization which acts as bank. In the last few years the Post office has been given the status of Bank and it performs all the functions of the Government Banks.
In fact it gives bit more of interest to the people depositing in it!
Do you have Post Office in your Country which performs the function of Banks?