Hope you are doing well and sorry for the trouble. As described you want to know if you will get the notification once the signature are completed.
Have you send the document for signature via Fill and Sign tool > Request for signature (Powered by Adobe Sign)? If yes, once you send the document for signature, you receive an email from Adobe Sign stating that the agreements have been sent to the first signer for signature. The first signer also receives an email with a link to sign the agreement. When the signer adds his or her signature in the signature field and then clicks the Click to sign button, the agreement is sent to the next signer with a link to sign, and so on. Once the agreement is signed by all the signers, everyone gets a copy of the signed agreement.