<h1>Undisclosed foreign income and assets challan requires PAN, separate company/non company payment codes, and bank acknowledgement details.</h1> Payment for undisclosed foreign income and assets must be made on the prescribed challan with separate minor head codes for companies and non companies, mandatory Permanent Account Number, itemised amount fields (income tax, interest, penalty, others), payer and bank particulars, and a taxpayers' counterfoil; bank acknowledgment must record BSR code, deposit date and challan serial number.