Postal Voting is other wise called:
Proxy voting and delegated voting are procedures for the delegation to another member of a voting body of that member's power to vote in his absence. Proxy appointments can be used to form a voting bloc that can exercise greater influence in deliberations or negotiations. A person so designated is called a "proxy" and the person designating him is called a "principal."
Riddick's Rules notes that under proxy voting, voting for officers should be done by ballot, citing the difficulties involved in authentication if a member simply calls out, "I cast seventeen votes for Mr. X."
India
In 2003, India's People's Representative Act was amended to allow armed forces personnel to appoint a proxy to vote on their behalf