What is the procedure followed in your organisation about the receipt and despatch of mail?
Will they affix any stamp as acknowledging the receipt of any letter?
If so, Please prepare a letter stating that, I worked in your organisation from _______ to __________ as __________. I served the Notice Period from ______ to _______. I have handed over my responsibilities to my successor Mr. ___________ on _________ which has been clearly explained to my then in charge Mr. __________. During my tenure I have served upto the satisfaction of my superiors/seniors, I was regular to office and there is no complaints raised on me. You are requested to issue a Service Certificate / Experience Certificate to that effect, so that I can carry on my journey in my career.
YOu are further requested to acknowledge the letter as received and if any deviation in the above details may be conveyed to me within 7 days from the receipt of the letter, failing which I can use this acknowledged letter as my service certificate, till you issue my Service / Experience Certificate.
If you successfully get acknowledged this letter and handed over the letter to the HR Department, they will have to issue you the Service Certificate / Experience Certificate without further delay.
Please give a try like this and confirm the further progress.
All the best