if all pax in d same PNR remains in WL after charting ( in case of e tkt ) it gets auto cancelled and d amount wil refunded to ur A/c in about 3 - 4 working days.
In case of partial CNF, u need to get certificate from TTE for WL pax not traveling and sent it to IRCTC NDLS for getting refund after filing TDR online ( for e-tkts)
Plz note : PARTIAL CNF E-TKT WILL NOT BE AUTO CANCELLED...