Digital Signature Certificate which is also known as DSC or Digital Signature is a substitute to the manual signature. It is a highly secured sign which is protected by the password known to the only person own it. Nowadays Government does not accept manual signs on various platforms like MCA, Income Tax, Tenders site, etc. which make it mandatory for the user to sign the documents or give his approval digitally through the digital signature. It can also be used for signing invoices, other documents which are not mandatory to be signed digitally as it will be a valid document as per law if it is signed through digital signature.