Hi,
I've made a couple of edits to the above.
Where I live, we wouldn't write this in this way, but other countries and cultures may find this suitable.
Clive
[This is a simple experience Certificate]
30/12/2007
To Whom It May Concern:
This is to certify that Mr. ......................................, son of .........................................., worked as a Senior Executive in our company from .............................. to ............................ with our entire satisfaction. During his working period we found him a sincere, honest, hardworking, dedicated employee with a professional attitude and very good job knowledge. He is amiable in nature and in character as well. We would have no objection to employing him in any better position, and he has no liabilities in our company.
We wish him every success in life.
For ................................
Manager, Accounting Dept.
XYZ Company