99digitalsignature.com Provides class 2, Class 3, DGFT Digital Signature. You use the DSC for different purpose just like ITR, PF Funding, Income tax return, Gst registration, GST Filling and Online Etender. The Digital Signature, as the name indicates is an authenticating signature, on the digital system. 99Digital Signature is one of the best digital signature certificates service providers in Delhi/NCR. DSC Certification has the same identification in sight of the law, as of the hand-written signature of a personal. It is a form of code which is embedded and can be used in the end of any e-form or other papers, through a specified procedure. However, before you begin using your signature you need to make it in a digital format.