Sample to whom it may concern letter

To whom it may concern

This is to certify that Mr. ____________________ was worked in this firm as a ________________for about ___________ years from _____________(month) to (month). He has a very good speed in ___________ (skills) and has good command over the English language. He is intelligent; painstaking and has full devotion to his duties. We are prepared to relieve him if he can improve his prospects thereby. We wish him success in his life.  For _______________  (Proprietor).