Category of "FEK" cookie, stored locally

We're setting up cookie consent for a customer and the cookie scanner has come across 1 cookie with an unidentified category. The cookie is stored when a contact form is loaded through a script.

Our customer has been in contact with the support and were told that we had to post on the technical forum.

It is the FEK cookie, which is stored locally. I just need to know if it's a functionality, marketing or advertisement cookie.

I can supply a link to our customers website if that helps.

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