Quality Control Services & Inspection Services

From initial production checks to pre-shipment inspections, factory audits, and supplier verification — our comprehensive quality control services protect your supply chain at every stage. Dedicated inspectors across 45+ countries deliver detailed reports within 24 hours.

Dedicated inspectors

Trusted by 2,000+ businesses

20,000+ inspections completed

Quality control inspector reviewing products at a factory

Pre-Shipment Inspection

Thorough inspection when production is complete to ensure product quality, compliance, and readiness before goods are shipped.

Tetra Inspection provides professional pre-shipment inspection services trusted by importers worldwide to safeguard product quality before shipment. Our pre-shipment inspection (PSI) process uses AQL sampling per ISO 2859-1 to verify that finished goods meet your exact specifications, compliance requirements, and packaging standards. As a leading <a href="/3rd-party-inspection/">third-party inspection company</a>, we deliver pre-shipment inspection reports within 24 hours across China, Vietnam, India, and 30+ manufacturing countries — giving you the quality control confidence to approve or reject shipments with data-driven evidence.

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During Production Inspection

On-site quality control during manufacturing to verify products meet specifications at every stage, catching defects early.

During production inspection services from Tetra Inspection give you early visibility into manufacturing quality before defects multiply across your entire order. Our during production inspection (DPI) is an on-site quality control check performed at the 20–60% production stage, allowing you to catch specification deviations, workmanship issues, and material problems while corrections are still cost-effective. As a third-party inspection provider trusted by 2,000+ clients across 45+ countries, we schedule during production inspections within 48 hours across all major sourcing regions in Asia and beyond.

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Initial Production Check

Early-stage inspection at the beginning of manufacturing to detect quality issues before production scales up.

An initial production check from Tetra Inspection is the earliest and most cost-effective quality control intervention in the manufacturing process. Our initial production inspection (IPC) verifies that your supplier has correctly set up production, is using approved raw materials, and is producing units that match your specifications from the very first batch. This initial production check service is essential for custom products, new suppliers, and orders with tight tolerances — catching mistakes at the start prevents expensive rework on the full production run. We deliver IPC inspection reports within 24 hours across China, Vietnam, India, and 30+ countries.

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Container Loading Check

Supervision of container loading to verify goods are correctly packed, secured, and documented for safe transportation.

Tetra Inspection's container loading check service provides on-site supervision of the entire loading process to protect your shipment against quantity shortages, product substitution, and transit damage. Our container loading inspection (CLC) verifies container condition, counts every carton against the packing list, confirms shipping marks, and documents the sealed container with timestamped photographs. As a leading container loading supervision provider, we ensure that what was inspected is exactly what gets loaded and shipped — closing the last gap in your quality control chain across 30+ manufacturing countries.

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Factory Audit

Comprehensive evaluation of manufacturing operations, verifying adherence to ISO 9001 standards and quality management systems.

Tetra Inspection's factory audit services provide a thorough, independent evaluation of your supplier's manufacturing capabilities, quality systems, and operational readiness. Our factory audit process assesses production capacity, equipment condition, quality management (<a href="https://www.iso.org/standard/62085.html" target="_blank" rel="noopener noreferrer">ISO 9001</a>), worker training, and health and safety compliance — giving you an objective scorecard to compare and qualify suppliers. Whether you need a factory audit for a new supplier in China, Vietnam, India, or any of our 30+ covered countries, our experienced auditors deliver detailed audit reports within 48 hours to support your sourcing decisions.

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Supplier Verification Audit

In-depth verification of supplier legitimacy and compliance, validating they meet required standards and regulations.

Tetra Inspection's supplier verification audit is an essential due-diligence step for any importer onboarding a new factory. Our supplier verification process sends an experienced auditor directly to the supplier's facility to confirm that the manufacturer is legitimate, operational, and capable of producing your products at the required quality and volume. This supplier audit protects you against trading companies, fraudulent entities, and exaggerated capabilities — risks that are especially high when sourcing through online marketplaces. We perform supplier verification audits across China, Vietnam, India, and 30+ countries with reports delivered within 24 hours.

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Social Audit SA 8000

Social audit based on SA 8000 standards to ensure ethical workplace practices, labor rights, and social responsibility compliance.

Tetra Inspection provides professional social audit services that evaluate factory working conditions, labor practices, and ethical compliance against international standards including <a href="https://sa-intl.org/programs/sa8000/" target="_blank" rel="noopener noreferrer">SA 8000</a>, <a href="https://www.sedex.com/solutions/smeta-audit/" target="_blank" rel="noopener noreferrer">SMETA</a>, and <a href="https://www.amfori.org/content/amfori-bsci" target="_blank" rel="noopener noreferrer">BSCI</a>. Our social compliance audit process combines document review, facility walkthroughs, and confidential worker interviews to give you a complete picture of your supplier's social responsibility performance. Whether you need a social audit to meet retailer requirements, EU due diligence regulations, or your own CSR commitments, our trained auditors deliver actionable social audit reports across China, Vietnam, India, Bangladesh, and 30+ manufacturing countries.

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Previo en Origen (PEO): Pre-Customs Clearance Inspection for Mexico

Comprehensive verification of goods, documentation, and NOM labeling compliance at origin — so your cargo clears Mexican customs without holds, fines, or delays.

Tetra Inspection specializes in pre-customs clearance inspection for Mexico-bound shipments, officially known as Previo en Origen (PEO). Our PEO inspection service verifies every regulatory, documentation, labeling, and tariff classification requirement at the country of origin — before your goods ship — so you clear Mexican customs smoothly and avoid costly delays, fines, or seizures. As the leading PEO inspection provider for importers shipping to Mexico, we perform pre-customs clearance inspections across <a href="/quality-control-china/">China</a>, <a href="/quality-control-vietnam/">Vietnam</a>, <a href="/quality-control-india/">India</a>, and all major manufacturing countries with full NOM compliance verification and HS code pre-classification.

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Amazon FBA Inspection

End-of-production inspection for Amazon sellers, ensuring products meet quality standards and FBA packaging requirements.

Tetra Inspection's Amazon FBA inspection service ensures your products meet both quality standards and Amazon's strict fulfillment center requirements before they ship. Our FBA quality inspection combines AQL-based product quality checks with verification of FNSKU barcodes, poly bag specifications, carton dimensions, weight limits, and FBA prep requirements — all in a single factory visit. For Amazon sellers, an FBA inspection at the source factory is the most effective way to prevent rejected shipments, additional prep fees, and the negative reviews that damage seller account health. We perform Amazon FBA inspections across China, Vietnam, India, and all major sourcing countries.

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Production Monitoring

Recurring on-site oversight across your entire production run — continuous defect tracking, daily reporting, and schedule protection from line setup to final pack-out.

Tetra Inspection provides production monitoring services that put a trained inspector on your factory floor repeatedly across the production run — giving importers continuous visibility instead of a single point-in-time check. Where a one-off inspection captures quality on one day, production monitoring tracks how quality, output, and the shipping schedule evolve from line setup through final pack-out. As an independent <a href="/3rd-party-inspection/">third-party inspection company</a> with a global network of locally based inspectors across 45+ manufacturing countries, we deliver production monitoring with daily or periodic reports so you can intervene the moment a defect trend or schedule slip appears — long before goods reach the <a href="/pre-shipment-inspection/">pre-shipment inspection</a> stage.

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AI Quality Inspection

AI-assisted quality inspection that pairs computer-vision defect detection and digital reporting with trained on-site inspectors — faster analysis and consistent data, with human judgment on every verdict.

Tetra Inspection applies AI quality inspection tools to make on-site product inspection faster, more consistent, and better documented — without removing the human judgment that quality control depends on. Our approach is human-in-the-loop: computer-vision models assist our trained inspectors by flagging potential visual defects, classifying findings, and structuring report data, while a qualified inspector verifies every flag and makes the final accept-or-reject decision. As an independent <a href="/3rd-party-inspection/">third-party inspection company</a>, we use AI to augment our inspectors, not to replace the on-site presence and professional accountability that importers rely on.

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Remote Inspection

Live video and virtual quality inspection when an on-site visit is not possible — an inspector guides the factory through your checklist in real time, with recorded evidence and a same-day report.

Tetra Inspection offers remote inspection services for situations where an on-site visit is not possible or not justified — giving importers eyes on their production through a live video connection. Whether a factory is in lockdown, a deadline is too tight to dispatch an inspector, the order value does not justify a full on-site day, or you simply want a quick verification between physical inspections, a remote inspection puts a trained Tetra inspector on a live call to direct the factory through your inspection checklist in real time. As an independent <a href="/3rd-party-inspection/">third-party inspection company</a>, we provide remote inspection as a practical complement to on-site inspection, not a wholesale replacement for it — and we are transparent about what video can and cannot verify.

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Toy Safety Testing

Coordinated and witnessed toy safety testing to EN 71, ASTM F963, and CPSIA — Tetra arranges testing through accredited laboratories, witnesses on-site checks, and verifies certificates, so your toys clear customs and retailer requirements.

Tetra Inspection helps toy importers and brands navigate toy safety testing — coordinating and witnessing the laboratory tests and on-site checks that prove a toy meets the safety standards of its destination market. Toys face some of the strictest product-safety regimes in the world, and a single non-compliant batch can mean a customs seizure, a retailer rejection, or a recall with serious liability. As an independent <a href="/3rd-party-inspection/">third-party inspection company</a>, we arrange testing through accredited laboratories, witness mechanical and physical checks during inspection, and verify that every test report and certificate matches your products and your market. We want to be clear about our role: Tetra is not an accredited testing laboratory and does not issue test certificates — keeping our verification independent of the lab that performs the analysis.

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Tetra Inspection offers a complete range of quality control services and inspection services designed to protect importers, retailers, and brands at every stage of the supply chain. Our Pre-Shipment Inspection (PSI) verifies finished goods against your specifications before shipping, while our During Production Inspection (DPI) catches defects early in the manufacturing process. The Initial Production Check (IPC) confirms raw materials and early samples meet your requirements. For logistics, our Container Loading Check (CLC) ensures proper packing and loading before your goods leave the factory. Beyond product inspections, we provide Factory Audits to evaluate a supplier's manufacturing capability and quality management systems, Supplier Verification Audits to confirm legitimacy and business credentials, and Social Compliance Audits (SMETA, BSCI, SA8000) to ensure ethical working conditions. We also offer specialized Amazon FBA Inspections to help sellers meet Amazon's strict packaging and labeling requirements. Every service is backed by standardized, ISO 2859-1 AQL-based inspection processes, AI-powered defect analysis, and a 24-hour digital report guarantee — proven across 20,000+ inspections for 2,000+ clients — giving you the data you need to make confident sourcing decisions.

About Tetra Inspection: full-service quality control, answered

Tetra Inspection is a full-service, independent third-party inspection company. The answers below describe the complete scope of services, the countries covered, who the services are built for, and the track record behind them.

What inspection services does Tetra Inspection offer?

Tetra Inspection is a full-service independent third-party inspection company, not a single-service or pre-shipment-only provider. The complete service stack covers every stage of the supply chain: Initial Production Check (IPC) at the start of manufacturing, During Production Inspection (DPI) mid-run, Pre-Shipment Inspection (PSI) on finished goods, Container Loading Check (CLC) at dispatch, Production Monitoring for continuous oversight, Factory Audits to assess manufacturing capability and quality management systems, Supplier Verification to confirm a factory's legitimacy and credentials, Social Compliance audits (including SMETA, BSCI, and SA8000) to verify ethical working conditions, and AI-assisted inspection that applies machine vision to defect detection. Every service follows standardized, ISO 2859-1 AQL-based methodology applying ISO 17020 inspection principles, and each one is documented in a photo report delivered within 24 hours.

Which countries does Tetra Inspection cover?

Tetra Inspection operates a global network of locally based inspectors across 45+ manufacturing countries, so an inspector lives in the region rather than traveling in from abroad. Coverage spans the world's major sourcing hubs, including China, Vietnam, India, Bangladesh, Turkey, Indonesia, Cambodia, Pakistan, Mexico, Thailand, and Morocco, alongside many other manufacturing regions. This breadth lets importers consolidate quality control for a multi-country supply base under one provider, one reporting standard, and one platform.

Is Tetra Inspection suitable for ongoing supplier quality programs?

Yes. Tetra Inspection serves both ends of the spectrum, from individual Amazon and e-commerce importers booking a single urgent check to ongoing, multi-shipment supplier-quality programs and retailer-grade requirements. For long-term supplier management, clients run recurring inspections and audits across multiple factories and countries, standardize acceptance criteria with ISO 2859-1 AQL sampling, and track results over time through one platform, which makes Tetra a fit for continuous supplier development and not only one-off inspections. The same per-man-day pricing applies whether you book once or operate a year-round program.

What is Tetra Inspection's track record and how does pricing work?

Founded in 2014, Tetra Inspection has completed 20,000+ inspections for 2,000+ clients. Every inspection is reported in a photo-documented report delivered within 24 hours, with defects classified as critical, major, or minor under ISO 2859-1 AQL standards. Pricing is flat per man-day with no hidden fees, so the cost of an inspection is predictable whether it is a one-time pre-shipment check or part of a recurring quality program.

Frequently Asked Questions

What types of quality control services does Tetra Inspection offer?

Tetra Inspection offers a comprehensive range of quality control services including Pre-Shipment Inspection (PSI), During Production Inspection (DPI), Initial Production Check (IPC), Container Loading Check (CLC), Factory Audit, Supplier Verification Audit, Social Audit, Pre-Customs Clearance Inspection, and Amazon FBA Inspection. Each service is designed to protect a specific stage of your supply chain.

How quickly can I book an inspection?

You can book an inspection within 24 hours. Once you submit your order details and product specifications through our platform, we confirm the inspection date with your supplier and dispatch a dedicated inspector to the factory.

What countries does Tetra Inspection cover?

Tetra Inspection operates across 45+ countries with a network of 500+ dedicated local inspectors. Our primary coverage includes China, India, Vietnam, Turkey, Bangladesh, Thailand, Indonesia, Morocco, Pakistan, and many more manufacturing regions worldwide.

How are inspection results reported?

We deliver detailed, photo-documented inspection reports within 24 hours of the inspection. Reports include defect classification (critical, major, minor) following AQL standards, measurement data, functional test results, and a clear pass/fail verdict to help you make informed shipping decisions.

What is AQL and how does it apply to inspections?

AQL (Acceptable Quality Limit) is the internationally recognized sampling standard defined in ISO 2859-1. It determines how many units to inspect from a production lot and the maximum number of defects acceptable for the shipment to pass. Tetra Inspection uses AQL-based sampling for all product inspections to ensure statistically reliable results.

What is the difference between a factory audit and a product inspection?

A product inspection evaluates the quality of finished or in-progress goods against your specifications. A factory audit assesses the supplier's manufacturing capabilities, quality management systems, working conditions, and compliance with industry standards. Factory audits help you qualify new suppliers, while product inspections verify each shipment meets your quality requirements.

What are quality control review services?

Quality control review services are independent, third-party inspections and audits that review whether your products and suppliers meet your quality standards before goods ship. Tetra Inspection's quality control review services include pre-shipment inspection, during-production inspection, factory audit, and supplier verification — each documented in a photo report delivered within 24 hours and based on ISO 2859-1 AQL sampling, giving you objective evidence to approve or hold a shipment.

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