I have one query regarding Income Tax Refund for F.Y 2016-17,for this Year some Assess Receiving his Refund by Cheque/DD,Instead of ECS .and because of that who have not proper address in PAN card,those refund are returned. In ITR also there is not any option to select refund source. Any one kindly let me know, it happing because of some thing not selected in ITR or its depend on AO,most of the client asking me that my friends got his/her refund by ECS and why refund came in Chq/DD.