A joint issue is the release of stamps or postal stationery by two or more countries to commemorate the same topic, event or person. Joint issues typically have the same first day of issue and their design is often similar or identical, except for the identification of country and value.

The Australia Post has collaborated several times with the postal administration of another country to release a joint issue.

The Austria Post has collaborated several times with the postal administration of other countries to release joint issues.

The Belgium Post has collaborated several times with the postal administration of other countries to release joint issues.

Deutsche Bundespost Berlin of West Berlin prior to German reunification in 1990 had released the following joint issues.

Bulgarian Posts of the Republic of Bulgaria have released the following joint issues:

Canada Post has released the following joint issues. The United States Postal Service has been Canada Post's most prolific philatelic partner.

The Cyprus Postal Services of the Republic of Cyprus has released the following joint issues.