correct assessment, and thinking the disciple to be sincere and faithful gave him initiation, only to later discover that he is a pretender, he,must make immediate redress for his mistake.

Remedy for the namaparadha

"If by inadvertence and lack of experience, a mistake such as instructing and initiating a faithless person occurs, the initiating spiritual master should be filled with fear and remorse. He has to publicize his offense before the Vaisnava community and reject that insincere disciple, excommunicating him. If the guru fails to act promptly, he'll gradually sink into the depths of moral depravity and illusion, and be disenfranchised from the path of devotion. O Lord Caitanya, Your instructions to those You have ordained to propagate the holy name warn exactly about this.

Lord Caitanya's instructlons to preachers

"You have explained that preachers must properly instruct the sroddhavan (persons with sraddha) about the holy name of God. In this way the whole world must be inundated with the chanting of the glories pf the holy name. With loud congregational chanting, the holy name should be propagated widely. Those who are sincere will come forward and choose a bona fide guru, receiving initiation into the name from him.

The fact is that you know you existed five years ago, and you know you exist today. Although you still exist, you know that the body you had five years ago does not exist today. Therefore, you know that your existence is not dependent on the existence of any one body you may have on at any particular moment—whether it is a "baby" body, an "adolescent" body, an "old" body, or whatever.
Siddhaswarupanda

By sincere chanting they will surely obtain love of Godhead, krsna-prema. Prostitutes, criminals, cheaters and other sinful people should be made to give up their unrighteous, injurious ways; sincere sraddha should be implanted, in their hearts. When their sraddha in Krsna's holy name matures, they must receive initiation. This is the duty of a preacher as he goes from place to place, teaching everyone.

The result of this namaparadha

"If, without paying heed to Your instructions, a guru initiates an insincere pretender, he commits a grievous offense for which he goes to hell. The namaparadhas committed by the charlatan disciple slowly but surely diminish the gurus spiritual potency; finally the guru is ruined. This offense has a devastating effect on both the guru and disciple: they both must enter hell.