Why Digital Signature Certificate (DSC) required on e-tendering portals

Signature is a person's name written in a distinctive way as a form of identification in authorizing a cheque or document or concluding a letter for identification. Signature is used for signing the Physical Documents. 

How to sign electronic documents

Electronic documents like e-forms, PDFs etc. are required to be signed digitally using a Digital Signature Certificate. Digital Signature Certificate is being used by Railway Users, Vendor Users and Bidders in IREPS for authentication during login process, Publishing of tenders, Signing and Submission of Techno-commercial and Financial Bids, Signing of Documents etc.