If the rabies FAVN report is attached to the electronically signatured cover letter you can verify documents from this link:
https://www.turkiye.gov.tr/tarim-ve-orman-bakanligi-ebys
You can find more information about the verification system from this link.
You can e-mail from an official e-mail address to etlik.vkmae@tarimorman.gov.tr . We will reply to your e-mail as soon as possible.