What Zarelli Space Authentication offers...

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Steve Zarelli Space Authentication provides professional authentication of astronaut, cosmonaut and aviation autographs. With over 20 years experience in collecting and professional authentication, you can be assured of reliable and impartial opinions. In my decades in the space and aviation autograph hobby, I have built a reputation of being a conservative analyst, passionate and ethical.

Zarelli Space Authentication Clients...

Zarelli Space Authentication, LLC is a UACC approved authenticator that has provided astronaut, cosmonaut and aviation autograph authentication services to individual collectors, dealers and organizations, including:

What trusted experts, dealers and collectors say about Steve Zarelli...

Steve Zarelli helped settle a huge issue for the U.S. Space Walk of Fame Museum!

Steve was chosen due to his long-standing reputation as an expert in the field of astronaut autographs. Steve did a thorough investigation and, not only deemed the signature to be authentic, but also provided detailed documentation to back up his findings.

Steve’s authentication settled this issue to the satisfaction of our buyer, and Steve refused payment saying he was happy to help our organization.

Steve Zarelli is a class act all the way.
— Charles Jeffrey, Collections analyst for the U.S. Space Walk Of Fame Museum and Member of the Board of Directors for the U.S. Space Walk of Fame Foundation.
I received my package today in perfect condition. Thanks for your excellent service!
— Alex M., Belgium
Steve Zarelli’s devotion to studying astronaut autographs and his willingness to share his knowledge has made him an invaluable member of the space memorabilia community. Steve’s skill and experience are highly-regarded and rightfully so.
— Robert Pearlman, editor and founder of collectSPACE.com
A Steve Zarelli COA and his opinion are the gold standard of astronaut autographs.
— Burke Burnett, Hawaii
I am impressed with all aspects of your authentication process. Thanks for your professional approach, and your follow up regarding the safe return of the material.
— Hugh Kelly, Massachusetts
I have known Steve Zarelli for a number of years and have complete and total confidence in his ability to properly authenticate space autographs. He is well versed in the autographs of all the astronauts and is extremely conscientious when he examines an autograph. They don’t come any better than Steve Zarelli.
— Richard Simon, Richard Simon Sports
Thank you for the quick and informative reply, you are a true asset to the collecting world. I am impressed how you identified the forgery. Very skilled work you do, Steve.
— Ryan Blumenthal, New Jersey
I received my items and LOAs back today and everything is perfect! I will be in touch with other pieces soon. It was a pleasure doing business with you and I could not be happier.
— Taylor Vans, Washington
Mr. Zarelli is certainly the finest authenticator in space autographs. He uses an amazing amount of personal experience and references to ensure he gets it right every single time. Steve Zarelli is also one of the nicest people on the planet and is the gold standard of authentic space autographs.
— Sean Monaghan, Pennsylvania
Steve Zarelli is the only person I trust to give me an honest, informed and reliable opinion on astronaut autographs. I’ve tried them all and he’s the best by a wide margin.
— Jason Brennan, Indiana
Steve’s expertise has saved me from making bad purchases on several occasions. He provides fast and friendly service and is always willing to answer questions. I trust Steve Zarelli’s opinion over any other authenticator presently in service. Period.
— Marty Peters, Wisconsin
Steve Zarelli has been a trusted space authenticator for me — as well as many others — for over a decade. He has a long history of having a keen eye and rooting out fakes. Steve’s insight and articles have been an asset to the collecting community, and he was instrumental in uncovering a large Neil Armstrong forgery ring.

I can without hesitation endorse Steve Zarelli as an authenticator for all of the above reasons, and can speak of his integrity that is of the highest calibre.
— Al Hallonquist, UACC Director, Aerospace Historian and Author, former agent to several astronauts
Thanks for the great work as always. It’s not just your experienced, expert eye that makes me and others want you to review our astronaut-signed items, it is also the attention to detail and consideration you consistently demonstrate.
— Steve Smith, Virginia
Steve Zarelli has proven to me many times over that his business ethics are pristine. I choose to exclusively do business with those who provide exactly what is advertised… and Steve is at the top of my list for that very reason. Steve Zarelli’s authentication skills seem unmatched in the industry, his prices are fair and he returns my items on time, every time.
— Jason Rubin, New Jersey