I Was Working With Education Based Institute In Surat For Past Couple Years.

Dear Sir
I was working with the Educational Institute for 2 Years. Now just i have resigned from that organization , there i have been worked on mutlipule postions so i need to know , wheather ask them to provide me with different different apppointment and experience letter as per postions or withine one letter , which is appropriate ?

Dear,
There is no point in making different appointment/experience letter. You appointment letter shall have the details of salary, designation, department etc etc which you had at the time of joining.
If you had any promotions during the tenure., then you may collect appraisal letters.
Collect experience letter mentioning the last designation/department you had. Remember whenever you apply for any new job, the employer will check whether you have a good 2 years experience in any particular domain/vertical/department or not as per their requirements. Once you mention in CV that you have worked in different department/vertical/domain in these two years, then simply might reject your application. However exceptions are always there as some small companies prefer multitasking employees.
Also note. ..if you worked in the same department in different positions due to promotions you got, then it will be taken positively.