Jquery Validate browser support

Jquery Validate browser support

Hi,
I have a client whose browser (IE - version unknown) repeatedly does submissions with either blank submissions or values in the wrong place (i.e. phone number where email address should be).  I do not think this is malicious tampering as the submissions are done as tests for campaigns.  It also happens enough times that it can not be coincidence.

jQuery version:

Validate version

I cannot re-create the issues myself, so I believe it is only happening on older browser versions.  Hoping for either a coding solution or a browser support list, so I can direct them on how to fix.

Thanks.