How To Write An Effective Experience Certificate?

An experience Certificate should be written on the official company letterhead. An effective experience certificate is one which describes in a little detail the responsibilities that someone used to fulfill and how their performance was while doing so. The designation of the person should be mentioned along with the title. An additional thing that can be added is some of the characteristics of the person. At the end of the certificate there should be the title, designation and signature of the person who is issuing the certificate. You can see some formats.

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I want sample of experience certificate from camp any  to issue the person