Registration verification: fresh GST applications may be rejected where prior cancellation persists and revocation was not sought. Proper officers must scrutinise new registration applications on the same PAN when an earlier registration exists or was cancelled, compare portal records and FORM GST REG-01 particulars, and treat failure to seek revocation of cancellation while statutory conditions continue as a deficiency, permitting rejection of the fresh application under rule 9(2) read with rule 9(4) of the CGST Rules.