Signature: Hand-signed with a paint pen by Michael Rooker, he portrayed Yondu in GOTG. Authentication: Comes with a Certificate of Authenticity (COA) from JSA, one of the most trusted names in autograph authentication. Material: High-quality aluminum plaque (not cheap plastic). The backing is acrylic, and it includes acrylic feet so you can display it standing next to your figure, statue, or collectible. Secured in bubble wrap for extra safety during transit.