The joy of being a graduate after several years in a university cannot be over emphasized, then there you go with your certificate looking fly at hand, with better grade or not.
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The first thing that might cross your mind is how to protect it with something that is permanent and termite resistant, lamination comes to mind.
Be cautioned, and never try to laminate your certificate because employers no longer accept laminated certificates, simple because fake certificates are mostly concealed by lamination for computers to be unable to detect them.
NOTE : This claim does not apply to every employer and in every corner of life.