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.

Why CGC Signature Series?

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

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

CGC Signature Series is the solution!

With CGC Signature Series, collectors can have their comic books, magazines, posters and prints signed by artists and creators in the presence of a CGC representative. The authenticity of the signature is then 100% certain, making the collectible eligible for the iconic CGC Signature Series yellow label.

The CGC Signature Series Label

The yellow CGC Signature Series label is given to collectibles that have been signed by someone of significance to the item. These labels will generally be issued only 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 them, when they were signed and, in some cases, where they were signed.

After the collectible is signed in the presence of a CGC authorized witness, it is immediately submitted to CGC for expert grading and encapsulation in the state-of-the-art, CGC holder that bears the prestigious yellow label. Your collectible is then safely returned to you to become a treasured part of your collection.

When buying and selling collectibles, CGC Signature Series is the hobby’s only 100% authenticated signature!

CGC Private Signings

Alternate Text

In-House Private Signings

It’s not always possible for fans to attend a comic con or other event to get their collectibles signed in person. CGC In-House Private Signings provide the answer! With In-House Private Signings, CGC invites individual artists, writers and other creators to its headquarters to sign collectibles at a designated time. While signing collectibles, many creators connect with fans through social media channels, and some may even do shout-outs. CGC In-House Private Signings are not affiliated with comic cons, so even if a convention is canceled, In-House Private Signings are not affected.

Alternate Text

Private Signings at Shows

CGC also offers Private Signings at shows. Our representatives coordinate with creators to have collectibles signed, and then the submissions are graded and encapsulated (often with expedited turnaround times). Books can either be submitted at the show where CGC is hosting a Private Signing, or you can mail your submissions to CGC headquarters, and we will bring the collectibles to the show to be signed. Your signed collectibles are then shipped back to you after certification. Our goal is to be the ultimate way for fans to connect with artists and creators at comic cons.

Check out the killer lineup of CGC Private Signing guests along with submission deadlines, and follow CGC on social media to always know who’s signing next!

CGC Private Signing Schedule

For both In-House Private Signings and Private Signings at shows, after the collectibles are signed, CGC grades and encapsulates them — or grades, presses and encapsulates them, if CGC pressing is requested — with the coveted CGC Signature Series label (custom Marvel and Skybound labels are also available upon request).

Alternate Text

CGC Sketch Covers

Whether your dream cover is an imaginative mash-up or something more traditional, there’s nothing quite like a unique sketch cover — which is why CGC loves to offer them during Private Signings. To submit a comic book for a CGC Sketch Cover, select the artist who you would like to do a sketch cover when you complete the CGC Submission Form. There are a limited number of spots available for sketch covers, so it is important to get submissions in early.

CGC Sketch Covers are treated the same way as the CGC Signatures Series comics: sketches are verified by an authorized CGC witness (or facilitator), graded and then encapsulated with the yellow CGC Signature Series label.

Eligible Signature Series Collectibles






Other CGC Signature Series Resources

CGC Services & Fees

Services & Fees

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

View Now >
CGC Authorized Facilitators

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.

Find a CGC Authorized Facilitator >
CGC Chat Boards

Chat Boards

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

Go to Signature Room >
CGC Help Center


Have a question? Find user-friendly answers to CGC’s most popular topics.

Read FAQs >