The Certificate of Authenticity from Dynamic Forces reads: Dynamic Forces Inc. has issued this certificate to authenticate this collection of "X-MEN / AVENGERS 30TH ANNIVERSARY CROSSOVER" including: X-Men #26 signed by Andy Kubert, Avengers #368 & #369 signed by Tom Palmer, Uncanny X-Men #307 signed by Dan Green and Avengers West Coast #101 signed by David Ross as one of a specially limited series of three thousand collections.
Only one certificate is included as all 5 books were sold by Dynamic Forces as a set.