I have no idea what this is, can you get examples or more details.

I have just googled, so no problem

Perfect Pages Designs would like to thank you for the "Invite" to work on your project. It is very tempting as I think designing a stock certificate face would be challenging and intriguing, however, unfortunately I am very busy with prior committments. Kindly keep me in mind for future certificate facings. Thanks again and good luck on this endeavor.
Perfect Pages DesignsSacramento, CA.