---
title: Clearinghouse query
description: An FMCSA Drug & Alcohol Clearinghouse lookup employers run before hire and annually thereafter.
date: 2026-01-10
lastReviewed: 2026-10-01
canonical: /glossary/clearinghouse-query
---
A **Clearinghouse query** checks whether a CDL driver has unresolved drug or alcohol violations in the FMCSA Clearinghouse. Employers run a **full query** with consent before employment and **limited queries** on the schedule FMCSA rules require.