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davidcyclebackCaiazzo's site says he not offering authentication services to the public.
The only established organization or person that I can find that says it/he will examine Beattles sigantures is PSA/DNA. If there is other expert or organization who is willing to handle book, they are more than welcome to speak up. It's not my book, I just said I would provide a local with a list of Beattles autograph experts he could contact.