In Experience letters^x, Tenses^x

Format 1: ======> Whom it may concern This is to certify that ………………work under …………… company as a Marketing Executive form 2nd July 05 to 15th Sep 05. During the service he was very punctual about his job. I wish him best of luck. Thanks/Regards ...

This is quite long? Perhaps you need to cut it down a little bit. If you put in too much shameless self-promotion then it is obvious that the letter was written by you rather than your company. Companies tend to take a dry attitude to these things. EXPERIENCE CERTIFICATE May 00 TO WHOM...