police clearance were issued by CIED or others called it as CID.you should have a police clearance from your country and should be updated.then you have to authenticate it from your Embassy and then go to the Ministry of Foriegn Affairs,you have to pay 25QR which is located near the Moven Pick Hotel and after that,you go to the CIED main office which is loacted in Azaziya near to Khalifa Stadium.bring your passport and a copy of it,the front page and the visa page the the date of your last entry/departure here in Doha.Bring also pictures,it is required,and copy of your Qatar ID.from there you will have some fingerprinting stuff and they will tell you to come back after 1 week. kindly register to Metrash so that anytime,they can notify you if your police clearance is ready for pick up.