Digital signatures are one of the most convenient ways to sign the document that is submitted electronically, and a signature is important to ensure the document’s authenticity. But the question is, can one use digital signatures without having a digital signature certificate? The answer is no.
You are not legally permitted to use digital signatures and cannot sign a document digitally without having a digital certificate. You can use the digital signature that is issued to you and not legally permitted to use that is not yours or not issued to you to use it.