Trending @Infosys; If we work closely with client do we need to inform client manager about resignation, is it against infosys policy ? Or manger will inform?

Depends on how close you are with the client. If you have confidence that that they will listen to you and keep it to themselves till infosys managers I informs them. The flip side of not telling and infosys management not telling them till last moment is that your personal relationship with that client may sour. So take a call based on how a relationship you have with the client.

Yes, it is against infosys policy. Inform yiur infosys manager abd let then handle it with client