One can use taj voucher on member rate too . Pay the total bill part by voucher and any balance pay by card. I have done this in most of the taj properties. Reason is one can select pay at hotel when booking online and when you checkin just tell them you would like to redeem voucher of 10k or 5k which ever. They wull redeem it in advance and any extra pay by card. I do these most of the time in taj westend and mg road taj