As we all knw that on cancellation of tatkal no refund is granted, but even on emergency few people dont travel , but they dont cancel the tkt bcz they dont want to be in queue at PRS . for this purpose i got one idea i think railway shud start online cancellation of PRS tkt for this railway shud send a secret code on the passanger mobile number ( as filled in reservation form ) after entering secret code with PNR number cancellation of tkt can be done, this will lead more benefit to wl passanger. wht u say member abt this.