Courrier-type - Relance pour impayé

Dear [Mr or Mrs or Sirs], We regret to note that the fourth instalment of [montant] in the agreed schedule of payments to clear account [références] was not made on [date]. Therefore, we wish to remind you of our letter of [date], in which we draw your attention to the fact that we shall have no choice but to refer the case to our solicitors in the event of a missed payment. We trust that you will immediately attend to this matter, so that we can avoid this unfortunate action. We look forward to receiving your remittance no later than [date]. Yours sincerely [votre nom] [votre fonction]