Before 4 year I take car for rent I give him blank...

 Please kindly note that, according to the data provided to you in your inquiry, and with reference to the Qatari Commercial Law, with regard to the check given to the rental company, here in the event of any debts being paid without refunding the check and submitting it to the court and claiming its value was unlawfully placed. Free of charge, for the purposes of circulating with the bank to suspend the check and file a lawsuit within a period not exceeding one week, the subject of which is account and commercial disputes, with presenting evidence on the validity of the claim, as well as submitting any clearances that would prove that the check is free of charge.