There is an easy-to-understand label placed on the interior of the holder on certified comic books.
The label displays the title, issue #, publisher and grade of a comic book. It can also display the importance
(for Key Issues) or the artist (if by an important artist). There are five different colored labels that represent:
Universal Label (blue)
This label is applied to comic books that are simply the grade as marked, with no qualifiers or special considerations.
Signature Series Label (yellow)
This label is applied to comic books that have been signed by someone of significance to the comic, under the direct observation of a CGC representative, and are thus certified as an authentic signature by CGC. In select instances, CGC may accept signed books directly from the signer/publisher.
Qualified Label (green)
A Qualified label is used by CGC for certified books that have a significant defect that needs specific description, or to note an unauthenticated signature (one which was not witnessed by CGC). For example, a comic book with a missing coupon that otherwise grades 6.0 will receive a Qualified grade, avoiding a considerably lower grade. CGC would give this book a Qualified grade of 6.0 and a Label Text notation “COUPON MISSING FROM PAGE 10, DOES NOT AFFECT STORY.” Or, if the book is signed on the cover it may be noted as “NAME WRITTEN ON COVER IN MARKER.”
Restored label (purple)
This label is applied to any comic book that has evidence of repair so that it will appear as it did when it was in its original condition. Restoration can come in a variety of degrees, from slight professional restoration (A-1) to extensive amateur restoration (C-5). View the CGC Restoration Grading Scale
NG – This label stands for "No Grade" and is assigned to comics that are either missing the entire cover, or one half or more of the interior pages, or both. It may also be assigned to comics that are only being verified as authentic, per CGC's discretion.
PG – This label is assigned to either a single page or wrap from the interior of a comic book. In the case of a page that cannot be associated with a particular issue, CGC will not assign a PG designation. Some interior pages display only advertisements on both sides, lacking part of the story that allows CGC to correctly identify the issue to which they belong. Unless this kind of page is submitted with other pages from the same copy, and resembles those pages in grade and page quality, it will be rejected and returned to the submitter.
CVR – This label is assigned to covers only, whether the front cover, back cover, or both. In the case of back covers that cannot be associated with a particular issue, CGC will not assign a CVR designation. An example of this scenario is the back cover to Amazing Fantasy #15, which is common to other Marvel comics printed that same month, as well as other months. If CGC cannot definitively tell the back cover is from Amazing Fantasy #15, it will be rejected and returned to the submitter.
CONSERVED LABEL (blue/grey)
This label is applied to any comic book with specific repairs done to improve the structural integrity and long-term preservation. These repairs include tear seals support, staple replacement, piece reattachment and certain kinds of cleaning. View the CGC Conservation Grading scale
SIGNATURE SERIES QUALIFIED LABEL (Yellow/Green)
Applied to a comic book that has been signed by someone of significance to the comic, and also exhibits a qualifying defect or unwitnessed signature. For example, if a comic book missing a page is signed by Stan Lee under direct observation of a CGC representative*, the book will be graded as if the page was not missing, and given the Qualified Signature Series label with a notation of the missing page on the label. Another example is if Stan Lee signed a high grade comic book under direct observation, but the cover also exhibited a signature not observed by a CGC representative. Stan Lee's witnessed signature (Signature Series) and the other signature (Qualifier in high grade) would result in a Qualified Signature Series label.
SIGNATURE SERIES RESTORED Label (yellow / purple)
Applied to a restored comic book that has been signed by someone of significance to the comic, under the direct observation of a CGC representative, and is certified as an authentic signature by CGC. Degree of restoration is also noted on the label.
SIGNATURE SERIES CONSERVED LABEL (Yellow/Grey)
Applied to a conserved comic book that has been signed by someone of significance to the comic, under the direct observation of a CGC representative, and is certified as an authentic signature by CGC. The conservation work is also noted on the label.
*In select instances, CGC may accept signed books.