Andy: You are absolutely right! Personally, I never cared for Dali and I was quite glad to get rid of the collection. It was a bit of a nightmare, particularly for the reasons you mention!
My dealings with Albert Field's office made it even more complex! Dali was known to sign blank sheets of art paper; they were later printed. Very complex.
As a boy I met the man at the Sherry Netherland with my father. When he walked into the restaurant, you could see that he wanted people to 'notice' him. And my father and I were surprised to see him again, two days later, in the Edwardian Room at the Plaza. (He stayed/lived further downtown at the St Regis). I remember my father telling me that Dali always wanted people to invite him to their table so he could have a free meal. I don't know if that's true, but from his behaviour, I can easily imagine it.
Walsand, I sold my collection of Miguel De Cervantes' Saavedra's Don Quichotte. I'd be glad to share any information I may still have from research we did at the British Library, if this will help you. Also, I would suggest that if your work is 'validated' it should have come with a providence.
I wish you every success
Fr Bill