| Issuer | Date | Desc | State | ||
| - | no image | Papua New Guinea | 1/5/2012 | empty sheet (#23577) | incomplete |
| - | no image | Papua New Guinea | 2/22/2012 | empty sheet (#23578) | incomplete |
| - | no image | Papua New Guinea | 4/11/2012 | empty sheet (#23579) | incomplete |
| - | no image | Papua New Guinea | 5/7/2012 | empty sheet (#23580) | incomplete |
| - | no image | Papua New Guinea | 6/18/2012 | empty sheet (#23581) | incomplete |
| - | no image | Papua New Guinea | 7/2/2012 | Orchids 2012, sheet of 4 types | all added |
| - | no image | Papua New Guinea | 7/27/2012 | Olympics 2012, sheet of 3 types | all added |
| - | no image | Papua New Guinea | 8/1/2012 | Year of the Snake 2013, sheet of 4 types | all added |
| - | no image | Papua New Guinea | 9/5/2012 | Traditional Clothes of Papua New Guinea, empty sheet (#23585) | incomplete |