The most common and most likely answer to this crossword clue is the 3 letter word PSS which also is the latest solution we found used in New York Times in 1954.
Addenda to a letter crossword clue answers
Here's a list of possible crossword answers ranked by the most likely to least likely.
| Answer | Likelyness | Letters | 
|---|---|---|
| PSS | 100 % | 3 | 
Words with a meaning similar to the clue: Addenda to a letter
These words may or may not be a possible solution to this crosswords clue.- pss
 - addendum
 - addition
 - additions
 - documentation
 - roots
 - affix
 - date
 - dating
 - ell
 - epithesis
 - expletive
 
Crossword Answer definitions
More crossword clues leading to the same solutions
Here's a few more crossword clues - all leading to the identical solution
More clues leading to the result PSS
- Letter additions: Abbr.
 - "Hey you!"
 - Additional thought letters
 - Afterthoughts (seriously, just rewrite the note)
 - Last-second, pre-envelope-closing scribbles: Abbr.
 - They come after signatures in snail mail, yet before signatures in e-mail: Abbr.
 - Written afterthoughts
 - Letter addenda
 - Afterthoughts (abbr.)
 - Prev. omitted points