CGC Signature Series

Certified Guaranty Company (CGC), the leader in professional comic book certification, pioneered witnessed signature authentication when it introduced CGC Signature Series — a certification service that assures signatures are 100% authentic.

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Why CGC Signature Series?

Every year, fans bring their prized collectibles to comic book and popular culture conventions around the world. They travel far and wide with just one goal in mind - to have their collectibles signed by artists, creators and celebrities.

Getting collectibles signed by fan favorites has been a part of the hobby since inception. Today, signed collectibles are highly-sought items. Signature authenticity has always been a concern, since collectibles rarely come with a foolproof guarantee.

CGC Signature Series is the solution!

With Signature Series, collectors can have their comic books, magazines, prints and posters signed by artists and creators in the presence of a CGC representative. These collectibles can then be 100% authenticated and encapsulated by CGC under the prestigious Signature Series label.

The CGC Signature Series Label

The yellow CGC Signature Series label is applied to collectibles that have been signed by someone of significance to the item. Generally, these labels will only be issued to items signed under the direct observation of a CGC representative. In select instances, CGC may accept signed books directly from the signer or publisher. The signatures are then authenticated by CGC with labels indicating who signed the item, when it was signed, and in some cases where it was signed.

After the collectible is signed in the presence of a CGC authorized witness, the item is immediately submitted to CGC for grading and encapsulation in CGC's patented, tamper-evident holder, to become a treasured part of your collection. When buying and selling collectibles, CGC Signature Series is the hobby's only 100% Authenticated Signature!

Eligible Signature Series Collectibles






Witness Application

Join our Witness team to be a part of the most prestigious Signature authentication program available.

With Signature Series, collectors can have their comic books, magazines, prints and posters signed by artists and creators in the presence of a CGC Signature Series Witness.

For more information or to apply, please view our application page.

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Other Signature Series Resources

Services & Fees

Find current fees, submission requirements and turnaround times for all CGC Signature Series' tiers.

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CGC Authorized Facilitators

If you are not attending a comic convention, there are still ways to have your books signed and submitted for Signature Series.

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Chat Boards

Connect with fellow collectors and CGC facilitators in our Chat Board’s Signature Room.

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