This verification tool allows you to confirm the validity of a job candidate's Linux Foundation Certification. Just enter the last name and Certificate ID number in the boxes below. (Source)
A tool allows someone presented with a certificate to get a validation by entering information in a form. It might be possible to have this also done via some kind of API (?)
Red Hat certificates can be looked up (Link) From the URL this could be passed as a parameter, is there an API??