I guess the employee should not sign on the experience letter. Also the way employee performed his duty has to be mentioned in the letter, highlight the positive factors of the employee as well. Also I believe that it is not the part of responsibility of the company to mention educational qualification of the departing employee. Pls correct me if I am wrong.
the below format may help.
May 05, 2007
RE: Mr. XXXXXXXXXXX
TO WHOM IT MAY CONCERN:
This is to cerify that Mr. XXXXXXXXXXX was employed by <company name> as a full-time Software Engineer from mm1/yyyy1 to mm2/yyyy2. During this period he worked 40 Hours per week.
During the period of employment at <company name> Mr. XXXXXXXXXXX’s duty were to Plan, design, develop, test and document application software using < technology list .... >
Mr. XXXXXXXXXXX has always rendered his services with the highest degree of responsibility and professionalism and we wish Mr. XXXXXXXXXXX all the best in his future endeavors.
29th November 2010 From Saudi Arabia, Riyadh