I get old (small portraits) quite often from my bank. I have a $20 in my wallet right now. I will generally spend them (unless a star or fancy serial number).
Got these from the bank today. The $50 has an ink transfer like the one that CitationSquirrel got on his. Ironically, they are the same year (1990). Would it be considered an error note? Other than the fold, it is in phenomenal shape almost uncirculated condition.