| Issuer | Date | Desc | State | ||
| - | no image | Papua New Guinea | 1/5/2011 | empty sheet (#23564) | incomplete |
| - | no image | Papua New Guinea | 2/8/2011 | empty sheet (#23565) | incomplete |
| - | no image | Papua New Guinea | 3/18/2011 | Pioneer Arts IV - 2011, sheet of 4 types | |
| - | no image | Papua New Guinea | 4/20/2011 | empty sheet (#23567) | incomplete |
| - | no image | Papua New Guinea | 5/25/2011 | empty sheet (#23568) | incomplete |
| - | no image | Papua New Guinea | 6/15/2011 | empty sheet (#23569) | incomplete |
| - | no image | Papua New Guinea | 7/7/2011 | empty sheet (#23570) | incomplete |
| - | no image | Papua New Guinea | 8/7/2011 | empty sheet (#23571) | incomplete |
| - | no image | Papua New Guinea | 8/25/2011 | empty sheet (#23572) | incomplete |
| - | no image | Papua New Guinea | 9/22/2011 | empty sheet (#23573) | incomplete |
| - | no image | Papua New Guinea | 10/19/2011 | empty sheet (#23574) | incomplete |
| - | no image | Papua New Guinea | 11/16/2011 | empty sheet (#23575) | incomplete |
| - | no image | Papua New Guinea | 12/1/2011 | empty sheet (#23576) | incomplete |