These are some of the existing tools so that you can request and digitally sign the necessary documents of your real estate agency:
Signeasy
Link to their website: https://signeasy.com/
ZohoSign
Link to their website: https://www.zoho.com/sign
Signaturit - Electronic Signature
Link to their website: https://www.signaturit.com/es/
Docusign
Link to their website: https://www.docusign.com/