 |
 |
 |
|
 |
|
 |
| Start / | Knowledge / | Safety Measures / |
| Accidentals | Differences | Errors | Kinds | Mistakes | Parallel Issues | Printers Waste | Quality |
 |
Knowledge / Safety Measures / Matrix Codes / Errors |
Matrix code error: philatelic term for a matrix code deviation caused by error |
|
  |
 |
Missing matrix code: postage stamp with not printed matrix code caused by error |
Inverted matrix code: postage stamp with inverted instead upright matrix code caused by error |
 |
 |