Check integrity of several emails and PDF files

I am looking for a freelancer to check the integrity of several emails and PDF files. The purpose of the integrity check is to verify authenticity, rather than to ensure they have not been tampered with or to identify any corrupted files. There are less than 50 emails and PDF files that need to be checked in total. Additionally, I have specific requirements for the integrity check that I will explain. If you have experience performing such checks and can do so according to my specifications, please get in touch. Thank you.