A digital signature certificate is an electronic form of a signature that can be used to authenticate the identity of the sender of a message or the signer of a document, and also ensure that the original content of the message or document that has been sent is unchanged. Digital signatures are easily transportable and cannot be imitated by someone else. The ability to ensure that the original signed message arrived means that the sender cannot easily disclaim it later. Now various government / private organizations initiate paperless digital signature certificate to authenticate the various documents filed by the applicants. Now the business / Individual tax payers uses paperless digital signature certificate (Class 3 – DSC) for ITR Filing, GST Filing and RoC Filings. Authentications using digital signature become mandatory for MCA, Universities, CBSE, DGFT, GST Department & Income Tax Authorities.