You can initiate your KYC with Dhan (once you have registered via Mobile) either using the Dhan Trading App (on Android or iOS) or using the Dhan website. 

Please do not share any personal information or KYC related documents with any person, even if he or she claims to be a part of Dhan. All information needs to be submitted for KYC verification alongwith necessary documents using the Dhan mobile app or Dhan website.. 

As per latest guideline it is mandatory to link your Pan and Adhar for Dmat Account Opening. Incase,the same is not linked you can link the same by visiting the link here