To find all timesheets that have been signed, or that need a signature:

1. Navigate to the  Billing module and select Timesheets
2. Select a date range and apply any desired filters
3. Click the Filters tab on the top left of the page
4. Click the Signatures  drop-down
5. Select Yes or No next to either Signed By Provider or Signed By Client

The steps for auditing signed and unsigned timesheets are the same for Billing.