Tradition has it that the Vatican Post Office issues a special stamp upon the death of a pope.
Officials in Vatican City Saturday said the so-called "vacant see" stamp will carry an image only of two crossed keys.
The traditional image on Vatican stamps issued while a pope is alive contains both the keys as well as other papal symbols.
These special stamps are only valid during the so-called "interregnum," or between the time of a pope's death and when a new one is elected by a conclave of cardinals.
The last time the Vatican issued a vacant see stamp was in 1978, when Pope John Paul I died.
Some information for this report provided by AP.