I just discovered that I was owed some money for a TV placement, because the cue sheet said ‘Alex’ instead of ‘Alexander’. Out of curiosity, I searched the PRS database with the names of some of the regular posters on here, and almost everyone has unclaimed royalties.
It’s worth checking with your own PRO, and try searching for any pseudonyms or variations of your actual name… If you don’t claim it, then the PRO will eventually keep it for themselves.
Post below if you find anything!