If you’ve ever requested a “National Criminal Database” search—commonly known in the background screening industry as “Nat Crim”—you might think you’re getting a comprehensive, coast-to-coast criminal history on a candidate. The name sounds definitive, almost like a one-stop-shop for uncovering a person’s entire record. But here’s the truth: “Nat Crim” is neither national nor a complete database.

At Metrodata Services, we believe in educating our clients so they can make informed hiring decisions. Let’s break down what “Nat Crim” actually is, why the term is misleading, and how to use it effectively as part of a smart screening strategy.

What “Nat Crim” Actually Does

The so-called National Criminal Database is more accurately described as a multi-jurisdictional criminal record search or a criminal discovery tool. It pulls together information from a variety of sources—county courthouses, Department of Corrections records, sex offender registries, and more—but coverage varies greatly by jurisdiction.

Some counties and states contribute regularly and thoroughly. Others provide limited or no data at all. That means there are significant gaps, and relying solely on this search can leave important records undiscovered.

Why the Name Causes Confusion

Industry experts like Scott Paler have been vocal about the need to rethink how we describe this product. The phrase “National Criminal Database” suggests completeness and accuracy. In reality, it should be viewed as a pointer tool—a way to identify potential records that require further investigation.

Marketing professionals may have favored the name “Nat Crim” for its appeal, but it has unintentionally misled employers into thinking this search alone is sufficient for due diligence. That’s why Paler and others are encouraging a shift toward more accurate naming—like “Criminal Discovery Index”—to better reflect the purpose and limitations of the search.

How to Use Nat Crim the Right Way

Used correctly, Nat Crim can be a valuable starting point in your background screening process. But it should never be the only check you rely on. At Metrodata, we recommend pairing it with:

• County-level criminal searches in jurisdictions where the applicant has lived or worked

• SSN trace and address history reports to guide targeted searches

• Federal criminal searches for crimes prosecuted in federal courts

• Civil litigation and alias checks for a fuller view of applicant history

Better Tools, Better Decisions, Metrodata Services

At Metrodata Services, we’re committed to transparency and education. We help our clients understand what each search does and doesn’t cover, so they can build screening packages that truly meet their risk tolerance and compliance needs.

Want to strengthen your background screening strategy with smarter tools and better insights? Contact Metrodata Services today to build a custom screening plan that leaves no critical gaps.

Request a No-Obligation Background Screening Services Consultation