Digital signatures added to an AS2 MDN Receipt allow the receiver of the MDN to verify your authenticity. The Decryption Certificate alias can also be used as the MDN Signature Certificate alias. If the certificate being used is already signed by a trusted authority (for example, Verisign, GoDaddy, Equifax, etc.) the certificate does not need to be imported as the trust is inherited. To add a digital signature to a MDN receipt follow the steps below: