Lettre-type - Demande d'état d'avancement d'un travail

Dear [Mr or Mrs or Sirs], We have checked our records and have noticed that [travail] is to be completed on [date]. As we have informed you when we signed the contract, it is very important for us that the deadline is strictly kept. Therefore we thank you to confirm the current position and to notify us of your progress to date, by return of post We look forward to hearing from you. Yours sincerely [votre nom][votre fonction]