About Steve Zarelli and Zarelli Space Authentication

Astronaut, cosmonaut and aviation autograph expertise.

Established in 2011, Zarelli Space Authentication has been retained by the world's leading auction houses and authentication companies, as well as collectors and dealers worldwide, for Steve Zarelli’s expertise in astronaut and aviation autographs. Zarelli Space Authentication Letters of Authenticity have appeared in virtually every credible, high profile auction house, often accompanying some of the most rare and desirable autographed items in the hobby. 

With over 20 years as a collector and professional authenticator, Steve Zarelli has met many astronauts, published numerous articles, contributed to books and have been on the forefront of identifying deceptive forgeries. Steve has a deep and comprehensive exemplar file of known authentic examples as well as documented forgery styles.

Most importantly, in his many years in the hobby, Steve Zarelli has built a reputation of being a conservative analyst, passionate and ethical.

Hobby Membership and Awards

• Board of Directors, Universal Autograph Collectors Club: 2011 to current

• Ethics Chairman, Universal Autograph Collectors Club: 2008 – 2011

• Universal Autograph Collectors Club Ethics Board: 2005 – 2008

• Distinguished Service Award 2006, Universal Autograph Collectors Club

Record-breaking prices with Zarelli Space Authentication