This haunts me, especially with Florida fish. How many spotted sunfish might I have mistaken for bluegill or other grunt species that I lumped with French grunts. Or did I catch a bigmouth sleeper. I've taken at least five or six species that I thought I had caught, e.g., black bullheads, from the life list because without a photo, I'm just not sure of the species . I have also gained a couple after review of the photos that I do have and as my knowledge base of species increases . Locally common names, e.g., bonito instead of false albacore, etc., did lead to some misidentifications which I believe that I have corrected.
Lately been using some INaturalist folks as reviewers for some species. Helped me split what I thought were all golden redhorse suckers and added the silver redhorse to the list.