Paying a debt with a check which the vendor has not yet cashed
Question

                I bought some merchandise from a company and I paid them by acheque    
It has been so long now and they never cashed it,and the cheque is void by now anyways. Do I still owe them the money or it is their fault for not cashing the cheque and taking the money.
Praise be to Allah.We
      put this question to Shaykh Muhammad ibn Saalih al-‘Uthaymeen (may
      Allaah preserve him), who answered as follows: 
Yes,
      you are still in debt to them, because when they did not cash the cheque,
      the money stayed in your account at the bank. You are in debt to them
      because the check is merely an instruction to the bank to transfer the
      money. And Allaah knows best.