Originally Posted by
Andriyko
I don't think one can combine different payment instruments (a certificate and points or money) in the same reservation, although some members reported that they were able to do that (but with points rather than cash).
I booked a 2 night minimum stay yesterday using a free night cert for the first night and points for the second. You have to call in but it is easily done. I don’t believe it can be a combination of a cert and cash though.