If I want to post a photographic portrait, how do I get a release consent if the people I want to post portraits of have been out of my life for years. I have no idea where they are. The last time I saw one of these people was in 1966. See photo below. Does this preclude me from posting portraits?
Great photo! Model releases are necessary for photographs that you want to sell as stock photography, but I believe you have two other choices: either don't put this in the marketplace when you upload it, or mark it "editorial use only".