I've always used his email contact.
No one can completely "reassure you" as there is risk involved with every business -- especially the autograph one. I'd advise posting the one you concerned about on this site as you will get some good opinions. Then it is up to you to decide.
I've had a very negative experience with him. He is not a good authenticator. And terrible businessman. Avoid.
Please know that Roger has been involved in the collecting, selling and more importantly the study of R&R Signatures as far back (as I can testify) to the mid 1980's, when I first met him at The NAMM shows (obtaining Don Felder's signature). He has been at this for probably what amounts to half his life. I have seen him at countless trade and convention shows and always buried up to his elbows in autographed memorabilia. He was at this long before Ebay and the internet, and he was dang near an expert even back then. He's two things in my book: Extremely experienced and also human. It will be tough to find anyone better.
My three cents.
I agree. He’s helped me A LOT and saved me from buying fakes several times.
Does he make mistakes? I’m sure he does. But to me, he’s still the best in the business by a wide margin.
Thanks Stephen, I appreciate your input. As I've shown here I'm a bit of an expert on U2, I've got them so many times in person, and I'm asked often for my opinion. I know when it's a yes, and I know when it's a nooooo.
But frankly, when I don't know I say I don't know.
Roger may be the best at what he does, I'll give you that.
But he should have the respect to answer someone's emails when that person knows to a certainty that Roger called it wrong.
My two cents, respectfully. Cheers