I am working on a real fixer-upper, i.e. 2000 Royal Rookies Baseball.
Nineteen of the 40 base cards (and over half of the inserts) have some sort of error. None of these were ever corrected, as this was a draft set that obvoiusly got slapped together and pushed out the door. Every card also exists as a parallel or autographed version, so all formats will carry the same faults.
Here's a sampling of the errors I've found...
Typos: pitching stat headings of "su" & "lg" instead of "sv" (saves) & "cg" (complete games); numerical stats "in the ballpark" (avg. of ".252", should be .249; SB of "26", actually 20)
Reverse negative photos: either just on back, or both front & back (airbrushing can try to hide it, but the evidence is there)
Incorrect data: a different player's stats; missing (blank) stat entries
Misspellings: single/double letter mix-ups; wrong vowels; extra/missing letters
I would think that the last category is the most offensive, especially if it involves the player's name. Even the company's own information on their mail-in offer card is a UER - "Send to... Witchita, KS".
I will ignore the minor, grammatical errors like: incorrect use of apostrophes, verb tenses, capitalization, or punctuation.
I'm also working on the three other Royal Rookies sets. Not quite as egregious as this one, but still with their share of faults.
So, how far should I go with "Note"-ing (and Note2-ing) all of these UERs?