| Issuer | Date | Desc | State | ||
| - | no image | Kiribati | 3/19/1999 | empty sheet (#23956) | incomplete |
| - | |
Kiribati | 4/27/1999 | iBRA '99, sheet of 1 type | all added |
| - | no image | Kiribati | 7/12/1999 | empty sheet (#23958) | incomplete |
| - | no image | Kiribati | 7/20/1999 | 30th Anniversary of the First Manned Landing on Moon, sheet of 1 type | all added |