A common packaging item for mailing [[letter|letters]] and documents, either through a mailing service or from a sender directly to a receiver. 

h4. See also

* [[hongbao]] [tn](Chinese monetary gift)[/tn]
* [[otoshidama]] [tn](Japanese monetary gift)[/tn]
* [[airmail envelope]]
* [[manila envelope]]
* [[wax seal]]
信封