Remember the whole third party validation / social proof thing from your Economics class? (thecreativepenn.com)
All NativeEnergy carbon projects that you can help build receive third party validation as meeting the requirements of the carbon standard. (nativeenergy.com)
We are required by the state of Texas to use Third Party Validation (TPV) sources to validate the identity of the students who register for the course. (idefensivedriving.com)