Authenticate Notice : Every communication by Income Tax department issued on or after 1st October, 2019 shall bear an unique Document Identification Number(DIN).
In order to satisfy yourself that the notice/order or any communication received by you is genuine and issued by Income Tax Authority, you can authenticate any notice/order or any communication using this service.
Authenticate Notice / Order issued by ITD service is available to both registered and unregistered users of the e-Filing portal as a pre-login service to verify the authenticity of a Notice, Order, Summons, Letter or any correspondence issued by Income Tax Authorities.