Félicitations pour service rendu (professionnel) (1)

Dear [Mr or Mrs or Sirs], We have been dealing with [nom et fonction] for two years and we wanted to tell you how [qualités] he has been to us. Thanks to him, we have been able to [action]. Though we have had to do this work in difficult conditions, his advices and handling of the situation have always proved to be correct and judicious. He also was much appreciated by all our employees and was an example to everyone. We are pleased to tell you that [nom] is a real credit to your firm. Yours sincerely [votre nom] [votre fonction]