Kalo offers an additional vetting tool called an 'Approval Badge'. The Approval Badge feature can be adjusted within the Admin section of an account. Clients typically use this feature to identify and confirm freelancers that have completed all of the required documents (MSA's, NDA's, W9's and more) that they may ask to be completed.
In order to approve a supplier, make sure you first add yourself as an Approver in the admin section.
Then go to a freelancer's profile, and click on the small shield button on the top right corner.
This will prompt a new window, where you will be able to approve the supplier by clicking on the green tick or disapprove by clicking on the red cross.
You will also be able to see the list of all other approvers below. Once the freelancer is approved, a shield will appear on his/her profile. If you click on the shield, you will see the list of people from your team who have approved or disapproved the freelancer.