I forgot my yahoo password and the back up account I don't know those passwords either...
GetHuman-brijohns's Technical Support issue with Yahoo from April 2018
Help with my Yahoo issue
Before contacting them, items GetHuman-brijohns may need:
Email on Account, Username, Password, and Name of Account Holder
GetHuman-brijohns's next move: go to the Yahoo help center.
Yahoo doesn't have a customer phone number that is answered by an agent. Instead, GetHuman-brijohns will want to follow the link below to head to their help center. We will check on GetHuman-brijohns later to make sure it's all set or try to help escalate.