A high-level team of the Population Census Organization, Islamabad, paid surprise visits to Central, East and South districts and conducted random interviews of different families through the "Field Quality Check Form (FQCF)." One of the deputy census commissioner after tallying the FQCF outcome from the register of the enumerators left for Islamabad, while another official would carry out the same exercise on Thursday in District West, a high-official of the provincial census organization told Dawn on Wednesday.