Amazon’s fulfillment network is fast and powerful — but only if your inventory arrives exactly the way Amazon demands. Get the prep wrong and shipments get delayed, rejected, or hit with unplanned fees at the fulfillment center. Here’s what FBA prep involves and how to get it right, especially when you’re shipping from abroad.

What FBA prep actually is

Fulfillment by Amazon (FBA) means Amazon stores your inventory, picks, packs, ships, and handles customer service. But before your products enter that machine, they have to be prepared to Amazon’s exact inbound specifications — labeled, packaged, and documented so they can be received and tracked without a human puzzling over them.

FBA prep is that preparation step. Done right, it’s invisible. Done wrong, it’s the reason your inventory sits in a problem queue instead of selling.

What proper prep includes

Depending on your product category, FBA prep can involve:

• FNSKU labeling — each unit labeled with Amazon’s barcode so it’s tracked to your account
• Poly bagging with the required suffocation warnings for applicable items
• Bubble wrap or protective packaging for fragile goods
• Bundling and kitting for multi-packs sold as a single unit
• Expiration date labeling for consumables, to Amazon’s date-format rules
• Box content labeling and accurate carton counts on inbound shipments
• Meeting weight and dimension limits so cartons aren’t rejected or surcharged

Each product category has its own rules. Miss one and the shipment can be refused at the dock.

Where international sellers get tripped up

If you’re shipping from outside the US or Canada, FBA prep collides with customs — and that’s where most delays happen:

• You can’t be the importer of record easily from abroad, so inventory often needs to clear customs domestically first, then get prepped and forwarded to Amazon.
• The end of de minimis means your bulk shipment into the US now requires formal customs entry and duties regardless of value (see The End of De Minimis) — so the customs step has to be planned, not assumed.
• Amazon won’t act as your customs broker. Inventory has to be landed and compliant before it reaches an Amazon facility.

The clean solution is to bulk-import into a domestic warehouse, prep to Amazon spec there, and forward compliant, labeled inventory into FBA. That’s a core part of what a fulfillment partner does for FBA sellers.

FBA prep for US and Canada

Selling on both Amazon.com and Amazon.ca multiplies the requirements:

• Separate inventory pools and inbound shipments for each marketplace
• Canadian compliance on top of Amazon’s rules — CFIA/Health Canada oversight for applicable products, and bilingual (English/French) labeling (covered in Bilingual Labeling for Canada)
• Duty and customs handled correctly on each side of the border

A brand that’s prepped correctly for the US is not automatically ready for Canada. The labeling and compliance layer is different.

Build it in-house or use a prep partner?

You can prep FBA inventory yourself, and some brands do at low volume. But it’s fiddly, error-prone at scale, and every rejected shipment costs time and money. A prep partner:

• Knows current Amazon inbound specs (which change) and preps to them
• Handles the customs-clearance-then-prep sequence for imported inventory
• Manages US and Canada requirements separately and correctly
• Forwards compliant inventory into FBA so it’s received without friction

TXG handles FBA prep to spec as part of fulfillment, including the bulk import and customs steps that international sellers can’t skip. Whether FBA is even the right model for you — versus FBM or a straight 3PL — is worth thinking through; see FBA vs FBM vs 3PL.

FAQ

What is Amazon FBA prep?
It’s preparing your inventory to Amazon’s exact inbound requirements — FNSKU labeling, approved packaging, expiration dating, box content labels, and more — before it enters Amazon’s fulfillment network, so it’s received and tracked without delays.

Why do FBA shipments get rejected?
Almost always because of prep issues: missing or wrong labels, non-compliant packaging, incorrect box content information, or exceeding weight/dimension limits. Correct prep before shipping avoids these.

Can I do FBA prep myself?
Yes, at low volume, but it’s error-prone and every mistake risks a rejected shipment. Many brands use a prep partner once volume grows or once they’re importing from abroad and need customs handled first.

How does FBA prep work for international sellers?
Inventory typically needs to clear customs domestically before it can be prepped and forwarded to Amazon, since Amazon won’t act as your customs broker. Bulk-importing into a local warehouse, prepping there, and forwarding to FBA is the standard approach.

Is FBA prep different for Amazon Canada?
Yes. Amazon.ca inventory needs separate inbound shipments plus Canadian compliance — including bilingual English/French labeling and, for applicable products, CFIA or Health Canada requirements — on top of Amazon’s standard prep rules.

Selling on Amazon US or Canada and want prep handled to spec — customs included? TXG bulk-imports, clears customs, preps to Amazon’s requirements, and forwards compliant inventory into FBA. Get a fulfillment quote →