If you have sent one or more sign-off requests that have not been completed by the recipient and you want to close them out yourself, you can do so via CONQA Console.
Go to CONQA Console
Select your project from the list
Navigate to the Sign-offs tab
Navigate to the Awaiting approval tab
Select the three dot menu ⋮ to the right of the sign off 'Close sign off'
Select 'mark sign-off complete'
The sign-off will then move to the closed tab.
NOTE: The sign off will appear as signed off by yourself in CONQA.