do you need to put return address on mail
Return address The return address is not required on postal mail. However, lack of a return address prevents the postal service from being able to return the item if it proves undeliverable; such as from damage, postage due, or invalid destination. Such mail may otherwise become dead letter mail.[2]
Return type You declare a method's return type in its method declaration. Within the body of the method, you use the return statement to return the value.
Email Messages are exchanged between hosts using the Simple Mail Transfer Protocol with software programs called mail transfer agents (MTAs); and delivered to a mail store by programs called mail delivery agents (MDAs, also sometimes called local delivery agents, LDAs). Accepting a message obliges an MTA to deliver it,[56] and when a message cannot be delivered, that MTA must send a bounce message back to the sender, indicating the problem.
Marriage license Today, they are a legal requirement in some jurisdictions and may also serve as the record of the marriage itself, if signed by the couple and witnessed.
Blind carbon copy It is common practice to use the Bcc: field when addressing a very long list of recipients, or a list of recipients that should not (necessarily) know each other, e.g. in mailing lists.[2]
Bank statement Today, the monthly mailing of bank statements is the norm in many countries. It is not customary in some countries, such as Japan, where individual account holders are expected to keep track of deposits, withdrawals, and balances using their own passbooks at ATMs.