Process Guide
FDA Private Laboratory Testing, Explained
When your shipment is detained, the evidence FDA weighs usually comes from a private laboratory. Here's what "private lab" testing means to FDA, the accreditation that matters, what goes into the analytical package, and how it reaches the agency.
The Short Version
What Is FDA Private Laboratory Testing?
It's independent, non-government laboratory analysis that an importer submits to FDA as evidence to overcome the appearance of a violation. When goods are detained — especially without physical examination under an import alert — the importer has the right to present evidence. That evidence typically takes the form of a Private Laboratory Analytical Package (PLAP): results from an independent lab, submitted as testimony under the FD&C Act, showing the product does not bear the violation FDA cited. FDA then reviews the package and decides. The labs are private; the standard they must meet is FDA's.
The Essentials
What Makes a Private Lab Package Count
- Submitted as Testimony
- The package is offered as evidence under the FD&C Act (Section 801) and FDA's import regulations — a formal submission, not an informal lab report.
- FDA Endorses No Lab
- FDA does not endorse or certify particular private laboratories. Choosing a lab qualified for your specific analysis is the importer's responsibility.
- Validated Methods
- Analyses must use appropriate, properly validated methods. The package must cite the methods used and explain and validate any deviations from official ones.
- LAAF Accreditation
- For certain detained foods, FDA requires testing by a laboratory accredited under its LAAF program (Laboratory Accreditation for Analyses of Foods). The charge and commodity determine when this applies.
- Representative Sampling
- Results are only as sound as the sample. Collection must be representative and documented under chain of custody, following FDA sampling expectations.
- Submitted via ITACS
- Packages are typically filed through FDA's Import Trade Auxiliary Communications System (ITACS) to the compliance officer handling the entry.
Not every lab is qualified for every test. FDA-accepted analysis depends on the lab holding the right accreditation and using a validated method for your specific analyte. Matching the lab to the charge is one of the most important early decisions — and one we help coordinate.
The Workflow
How Private Lab Testing Reaches FDA
From detained shipment to a decision, the analytical evidence moves through a defined path:
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Match the Lab to the Charge
The charge on your notice sets the required analysis and the accreditation the lab must hold (including LAAF where applicable). The right lab and method are chosen before anything is collected.
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Representative Sampling
A trained sampler collects representative samples of each detained line item under documented chain of custody, following FDA sampling expectations, and ships them to the lab.
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Analysis & Package
The lab analyzes the samples with validated methods and assembles the Private Laboratory Analytical Package — results, methods, raw data, and quality-control documentation to FDA's standard.
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Submission & FDA Review
The package is submitted, typically via ITACS, to the compliance officer, who reviews it. FDA may audit results by collecting its own sample. FDA makes the final admissibility decision.
Be Realistic
What Private Testing Can and Can't Do
Honest limitations
- Good results can't fix bad sampling. A package built on a non-representative sample or broken chain of custody can be rejected regardless of the numbers.
- The wrong accreditation sinks it. If the lab isn't qualified for that analysis — or LAAF is required and absent — FDA can decline the package before the science is even weighed.
- Testing proves this lot, not the firm. A clean package can support releasing this shipment; it doesn't remove an import alert. Removal is a separate petition.
- FDA can audit and can disagree. The agency may take its own confirmatory sample and reaches its own conclusion; a private result is evidence, not a verdict.
- No guaranteed outcome. We coordinate qualified labs, sound sampling, and complete packages to give evidence its best footing — but FDA decides admissibility.
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Send your Notice of FDA Action and the charge it cites. We'll coordinate an appropriately accredited lab, representative sampling, and a complete analytical package aimed squarely at what FDA is looking for.
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FDA Detention Sampling is an independent private company. We are not affiliated with, endorsed by, or part of the U.S. Food and Drug Administration, and FDA does not endorse any private laboratory. This guide is general information about the FDA import detention process and is not legal advice. Sampling, laboratory testing, documentation, and coordination services do not guarantee FDA release, admissibility, acceptance of laboratory results, removal from any import alert, or any specific regulatory outcome. FDA makes the final admissibility decision.