| Answer | Crossword Clue |
|---|---|
| ATTN | Letter-routing notation |
| POSTALCODE | Letter-routing number |
| ATTN | Letter-routing letters |
| ATTN | Letter-routing abbr. |
| ATTN | Letter routing abbr. |
| ENC | Letter notation |
| INRE | Business-letter notation |
| ENC | Business letter notation: Abbr. |
| PPS | Second notation at the bottom of a letter |
