| Issuer | Date | Desc | State | ||
| - | no image | UN offices in Vienna | 6/20/2018 | 50th Anniversary of UNOOSA, sheet of 1 type | |
| - | no image | UN offices in Vienna | 9/21/2018 | MACAO 2018, empty sheet (#63744) | incomplete |
| - | no image | UN offices in Vienna | 10/1/2018 | International Music Day 2018, sheet of 12 types |