This is not permissible, one must make istikhara on behalf of himself.
Anyone who asks for the date of birth or for the name of the mother, he is.a soothsayer and consulting them without believing them voids the reward of your prayers for 40 days.

Sheikh I m a Pakistani, some people here perform istikhara for others, without any payment , but they do ask for name of mother for istikhara, for example if istikhara is for marriage,they will ask name of boy & girl,& names of mothers of both… Is it authentic way or not?