Sheets of Poland, 1998
| Issuer | Date | Desc | State | ||
| - | no image | Poland | 1998 | empty sheet (#86341) | incomplete |
| - |  |
Poland | 4/28/1998 | Protection of The Baltic Sea, empty sheet (#8929) | incomplete |
| - |  |
Poland | 9/18/1998 | empty sheet (#8930) | incomplete |
| - |  |
Poland | 9/18/1998 | empty sheet (#8931) | incomplete |
| - |  |
Poland | 12/24/1998 | Adam Mickiewicz 200th, empty sheet (#8932) | incomplete |