Vetting is checking somebody's background before trusting them. Security vetting, vetting procedures, pass the vetting.
The levels are formal in government work, running from a basic check to one that interviews your friends and examines your finances. The word comes from having a horse examined by a vet before buying it, which is exactly the idea.
1nounvettingChecking somebody's background before trusting them.
“All new teachers go through vetting before they are allowed to work with children.”
vetting is a checking.
vet a clipping of veterinarian.
Etymology from Wiktionary, CC BY-SA