Selling on Amazon is a fast way to grow. But your success depends on one thing — product quality.

You find a supplier on Alibaba. You place a large order. The goods arrive at the Amazon warehouse. Then the problems start. Products break. Sizes are wrong. Labels peel off. Amazon flags your account.

This is where FBA inspection service in China comes in. It catches problems before your products leave the factory. It saves you money, time, and your seller reputation.

In this guide you will learn:

• When to order a pre-shipment inspection (PSI) vs during-production inspection (DPI)
• How FNSKU labels and packaging affect your inspection plan
• How inspection connects to FBA inbound acceptance
• A full inspection checklist for FBA products
• What drives inspection pricing
• Real case studies with numbers

1. When to Order PSI vs DPI for Your FBA Shipment

Two main types of inspection apply to FBA imports. They serve different purposes. They happen at different stages.

Pre-Shipment Inspection (PSI)

PSI happens when the factory has finished production. Usually 80-100% of the order is ready. The inspector checks random samples from the finished batch.

Use PSI when:

• You already have a trusted supplier and a proven product
• This is a repeat order with no design changes
• The product is simple — basic textiles, bags, promotional items
• You have tight timing and cannot stop production mid-run
• The order value is under $10,000

PSI is the most common inspection type. It is fast and cost-effective. A typical PSI costs $169 per man-day and covers visual checks, measurements, function tests, and packaging.

During-Production Inspection (DPI)

DPI happens while the factory is still making your products. Usually 10-20% of production is complete. The inspector can spot problems early and stop them.

Use DPI when:

• This is your first order with a new supplier
• The product has complex manufacturing steps — electronics, precision parts
• You made design or material changes since the last order
• The order value is over $20,000
• You cannot afford to re-order before your FBA shipping deadline

Quick Decision Table

Factor	Choose PSI	Choose DPI + PSI
Supplier relationship	Trusted, repeat orders	New or unproven
Product complexity	Simple (bags, textiles)	Complex (electronics, tools)
Order value	Under $10,000	Over $10,000
Design changes	No changes	New spec or material
Time sensitivity	Tight — cannot delay	Can afford 2 extra days

2. FNSKU Labels, Packaging, and FBA Requirements

Amazon's warehouse is very strict about how products arrive. They check every box. They scan every label. If something is wrong, your shipment gets flagged.

This is where FBA inspection is critical. Your inspector checks packaging and labeling before the goods leave the factory. These checks cost almost nothing. A labeling mistake can cost you weeks of delay.

FNSKU Labels

Every product that sells on Amazon needs an FNSKU barcode. This label tells Amazon exactly which product is inside each unit. A wrong or missing label means the warehouse cannot receive your goods.

• Check 1: Every unit has the correct FNSKU label. Compare the barcode number against your Amazon seller central listing.
• Check 2: The label is readable. No smudges, tears, or ink bleeding. Amazon's scanners reject damaged barcodes.
• Check 3: The label is on the right surface. Flat, clean, and on the outside of the poly bag or product packaging. Never on a curved or shrink-wrapped surface.
• Check 4: The label placement is consistent. All units have the label in the same spot. This helps Amazon's automated systems scan faster.

Master Carton Labels

Each shipping carton needs a label too. Amazon uses these to track pallets and containers.

• Each carton must have an FBA box ID label (XX0000-XXXX format)
• The label must not be covered by tape — Amazon workers scan at 45 degrees
• Two labels on opposite sides of each carton reduce scanning delays
• Labels must be printed at 300 DPI or higher. Blurry labels cause rejections.

Packaging Requirements

Amazon has basic packaging rules. Your inspector should check all of them.

Check	Requirement	Common Failure
Carton strength	Single-wall or double-wall, weight under 50 lbs	Overweight boxes (over 50 lbs need team lift label)
Sealing	Strong packing tape on all seams	Masking tape, duct tape, or tape peeling at edges
Fill material	Bubble wrap, air pillows, or foam	Loose fill (styrofoam peanuts) or no fill
Poly bags	Thickness ≥1.5 mil, warning label if opening ≥5 inches	No suffocation warning label or bag too thin
Expiration dates	Clearly printed, at least 90 days remaining	Faded or missing date stamps

3. How Inspection Connects to FBA Inbound Acceptance

Amazon's warehouse does a quick check when your goods arrive. But it is not a quality inspection. Amazon checks the labels and cartons. They count the boxes. They scan the barcodes.

Amazon does not open every unit. They do not test products. They do not check if the color or size matches your listing. That is your job.

What Amazon Checks at the Warehouse

• FNSKU barcode scan rate: Amazon expects 99.5%+ first-pass scan rate. If labels are damaged or misprinted, the goods go to problem resolution. This delay can take 3-10 business days.
• Carton condition: Crushed or wet boxes get flagged. The whole pallet may be held.
• Product condition: If the box arrives open or units are visibly damaged, Amazon marks them as "damaged inbound" and charges you disposal fees.
• Expiration dates: For consumables, the date must have at least 90 days of shelf life. Products with less than 90 days are destroyed.

What Amazon Does NOT Check

• Product function — does it work?
• Size and weight — does the product match the listing?
• Color and design — is it the color you ordered?
• Material quality — is the fabric right?
• Accessories — are all pieces included?
• Safety — are there sharp edges or choking hazards?

The Inspection-FBA Chain

Here is how the process works end-to-end:

1. Factory produces goods — With or without DPI oversight
2. PSI at factory (recommended) — Inspector checks samples at the factory before loading
3. Label and packaging verification — Inspector confirms FNSKU labels, carton labels, packaging
4. Container loading supervision (optional) — Inspector watches the container being loaded
5. Goods arrive at Amazon warehouse — Amazon scans labels, inspects cartons, receives inventory
6. Customers buy and receive products — Quality is tested by real users, not Amazon
7. Returns and reviews start — Good products get 4-5 stars. Bad products get returns and negative reviews.

Without a pre-shipment inspection, steps 3 and 4 are blind. You do not know if the labels are correct. You do not know if the packaging is strong enough. You do not know if the products work.

4. FBA Inspection Checklist — What Your Inspector Should Check

A complete FBA inspection covers five areas. Each area has specific checks. Use this as your checklist when booking an inspection.

4.1 Product Quality (AQL Sampling)

The inspector uses a standard called AQL (Acceptable Quality Limit) to decide how many units to check. This is an industry-wide method.

For FBA products, most sellers use AQL 2.5 for major defects and AQL 4.0 for minor defects. Here is how the sampling works:

Lot Size	Sample	Max Major Defects	Max Minor Defects
500 units	50	3	7
1,000 units	80	5	10
3,000 units	125	7	14
10,000 units	200	10	21

4.2 Visual and Appearance Check

• Surface defects — scratches, dents, discoloration
• Mold lines and flash — excess plastic on injection-molded parts
• Print quality — text is readable, colors match the approved sample
• Assembly — parts fit together, no gaps or loose joints
• Cleanliness — no grease, dust, or manufacturing residue

4.3 Measurement and Weight

• Product dimensions — compare to your spec sheet. A 2% difference is usually acceptable for soft goods. For electronics, 0.5% may be the limit.
• Product weight — check with a digital scale. Amazon charges fees based on weight. Wrong weight means wrong fees.
• Packaging dimensions — carton size and weight matter for shipping cost.
• Wall thickness — for containers, bottles, and cases.

4.4 Function Test

• Does the product power on? For electronics, check all buttons and ports.
• Does it perform its main function? A charger should charge. A flashlight should turn on and off.
• Do accessories fit? Cables, adapters, and extra parts must work.
• Battery test — does it hold a charge? Does it drain too fast?
• Sensor or display test — for smart products with screens or touch.

4.5 Packaging and Labeling for FBA

• FNSKU label — correct barcode, readable, properly placed
• Carton label — FBA box ID, readable, on two sides
• Poly bag — correct thickness, suffocation warning if needed
• Carton strength — right material, properly sealed
• Case pack quantity — number of units per carton is consistent
• Mixed SKU check — no different SKUs in the same carton (unless labeled for mixed SKU)

5. What Drives Inspection Pricing for FBA?

Inspection pricing in China is simple. Most companies charge per man-day. A man-day is one inspector working for one day (about 8 hours on-site).

Here is what affects your cost:

Factor	Impact on Price	Typical Range
Base rate per man-day	Fixed	$169 (CloudSpects) — $400+ (large firms)
Order size / sample count	Up to 200 samples per man-day	1 man-day for most orders under 3,000 units
Product complexity	Simple = 1 day, Complex = 2-3 days	+1 day for electronics or assembled products
Factory location	$0 extra in major hubs	$50-100 extra for remote factories
DPI + PSI combined	Two visits = two man-days	$338 total (2 × $169)
Container loading supervision	Add-on, typically 1 man-day	$169 extra
Rush service	+20-50% surcharge	$200-250 for same-day or next-day booking
English report	Included at CloudSpects	Free

Compare this to the big firms. SGS charges $400-600 per man-day. QIMA charges $309+. Bureau Veritas charges $450+. The inspection result is the same. The difference is the price and the service speed.

6. Real Case Studies — FBA Inspection in Action

Case 1: Phone Case Seller — Saved $4,800 in Shipping Costs

The situation: A US-based seller ordered 8,000 phone cases from a Shenzhen factory. The cases were priced at $3.50 each. Total order value: $28,000.

The inspection: They ordered a PSI at AQL 2.5. The inspector checked 200 units.

The finding: 18 units had wrong dimensions. The cases did not fit iPhone 14 Pro models. The camera cutout was 1.2mm off.

The result: The factory caught the error early. They adjusted the mold and re-ran the batch. The seller avoided shipping 8,000 wrong cases. At $0.60 per unit in shipping costs, they saved $4,800. Plus they avoided 8,000 returns and 800+ negative reviews.

Cost of inspection: $169 (one man-day). ROI: 28x.

Case 2: Portable Charger — Failed Safety Check

The situation: An importer ordered 3,000 portable power banks. These are battery products with strict safety requirements.

The inspection: A DPI was ordered at 10% production, followed by PSI at 100%.

The finding: At DPI, the inspector found that 3 out of 5 test units had overheating issues. After charging for 30 minutes, the surface temperature reached 58°C (136°F). Safe limit is 45°C (113°F). The battery cells were from a different supplier than the one specified in the contract.

The result: The factory replaced the battery cells with the correct ones. The batch was re-manufactured and passed PSI. Without DPI, these units would have arrived at Amazon. Amazon's fire safety team would have flagged the listing. The seller's account would have been suspended.

Cost: $338 (DPI + PSI). Potential loss avoided: Account suspension, $15,000 in inventory, and possible legal liability.

Case 3: Kitchen Gadget — Label Error Caught at Loading

The situation: A UK-based seller ordered 2,000 vegetable choppers from a factory in Yiwu. The units had passed PSI with no product issues.

The inspection: The seller added container loading supervision (CLS) despite the clean PSI result.

The finding: The loading inspector noticed that one pallet had the wrong FNSKU label. The label showed a different ASIN for a related product. 500 units were affected.

The result: The inspector stopped the loading. The factory re-labeled the pallet. The shipment continued. If the wrong labels had reached Amazon, those 500 units would have been received under the wrong ASIN. Customers ordering the wrong product would have left 1-star reviews. Fixing this mistake at Amazon's warehouse would have cost $5 per unit in re-labeling fees ($2,500 total).

Cost: $169 (CLS). ROI: 14.8x.

7. How to Book an FBA Inspection in China

The process is straightforward.

1. Contact the inspection company — Tell them your product type, order size, and factory location.
2. Choose the inspection type — PSI, DPI, DPI + PSI, or add CLS.
3. Share your product spec sheet — Include dimensions, weight, materials, and approved samples.
4. Provide FBA packaging details — Share FNSKU labels, carton labels, and packaging instructions.
5. Confirm the booking — The company schedules an inspector and sends you a confirmation.
6. Get the report — Within 24-48 hours, you receive a detailed English report with photos.
7. Decide on shipment — If the report shows a PASS, the goods can ship. If FAIL, request factory rework.

At CloudSpects, booking takes 24 hours or less. We cover all major factory cities in China — Shenzhen, Guangzhou, Yiwu, Ningbo, Shanghai, and more.

Last updated: May 2026. Prices and turnaround times are based on standard service levels and may vary by location and product type.

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