If the return address is in the same country as the original destination address, and provided the full address and zip code / postcode details are provided, nothing further is required after the return address.
If the return address is not in the same country as the destination address, then the return address should also state the name of the country in which the return address is located. The country name is often written below the zip code / postcode.
The Universal postal convention recommends that the name of the place of destination and the name of the country of destination be written in CAPITAL LETTERS together with the correct postcode number or delivery zone number, if any.
Some companies write "If undelivered, please return to: " above their return address on the envelope.
For Mailing address formats by country, see Related linksbelow.
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