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Navigating Commingled Inventory vs. Amazon Barcodes

When it comes to successfully selling on Amazon, one of the most pivotal decisions that sellers must make is how they manage their inventory. This decision doesn’t just affect internal logistics—it impacts delivery speed, product authenticity, and overall customer satisfaction. For sellers working with an Amazon Fulfillment Center in Oregon or any other regional center, choosing between commingled inventory and using Amazon barcodes is essential to ensuring operations run smoothly and customer trust is upheld.

Amazon’s vast fulfillment network, including the Amazon Fulfillment Center in Oregon, is designed to help sellers deliver products quickly and efficiently. However, the choice between commingled inventory and barcoded items can make a significant difference in how your products are processed and handled.

What is Commingled Inventory?

Commingled inventory, also referred to as stickerless inventory, allows Amazon sellers to ship their products to fulfillment centers—like the Amazon Fulfillment Center in Oregon—without placing unique Amazon barcodes (FNSKU) on each item. Instead, Amazon uses the manufacturer’s barcode, such as a UPC (Universal Product Code), EAN (European Article Number), or ISBN (International Standard Book Number), to manage and track these items. In this system, identical products from different sellers are pooled together into the same storage bin.

This inventory strategy is beneficial in terms of speed and simplicity but comes with its own set of risks.

Image about the Amazon Fulfillment Center in Oregon

Pros

  1. Efficiency in Fulfillment

    When using commingled inventory, Amazon has the flexibility to fulfill customer orders from the nearest fulfillment center. For example, if a buyer in Portland, Oregon orders a product and that same item is available at the Amazon Fulfillment Center in Oregon—even if it belongs to a different seller—Amazon will ship it from that location. This geographic efficiency can dramatically reduce shipping times and improve customer satisfaction.
  2. Reduced Operational Costs

    Sellers save valuable time and money by not having to print and apply unique labels to every item. This not only minimizes labor costs but also reduces the need for labeling materials. For small to medium sellers looking to scale efficiently, this can be a cost-effective strategy.
  3. Simplified Inventory Management

    Managing inventory becomes less complex since sellers don't need to track each item individually. The streamlined process helps reduce errors in inventory reconciliation, making it easier to manage stock across multiple fulfillment centers, including high-volume centers like the one in Oregon.

Cons

  1. Risk of Counterfeit Products

    The biggest downside of commingled inventory is the risk of counterfeit or inferior-quality products being mixed into your stock. If another seller provides subpar or fake versions of the same item, and a customer receives it with your name on the listing, your brand reputation could suffer. This is a notable risk, even at highly efficient centers like the Amazon Fulfillment Center in Oregon.
  2. Lack of Control

    Sellers relinquish control over which item a customer receives. Since products are pooled, there's no guarantee that the unit shipped is from your specific stock. This opens up potential issues with quality control, especially for private label or brand-sensitive products.
  3. Potential for Negative Feedback

    If a buyer receives a counterfeit or defective item from the commingled pool, the original seller may receive negative feedback or even face account suspension. Even though the fault lies elsewhere, the consequences can affect your standing as a seller.

What are Amazon Barcodes?

ASIN stands for Amazon Standard Identification Number. It’s a unique 10-character alphanumeric code assigned to every product listed on Amazon. While this helps categorize and display listings to buyers, it doesn’t link inventory to a specific seller.

ASIN

ASIN stands for Amazon Standard Identification Number. It’s a 10-character alphanumeric code assigned to each product listed on Amazon. ASINs help catalog and index products, making them easily searchable for customers. Like UPC, this code identifies products but not the seller.

FNSKU

FNSKU, or Fulfillment Network Stock Keeping Unit, is a unique barcode generated by Amazon that directly ties an item to the seller who listed it. It is particularly important for sellers using Fulfillment by Amazon (FBA). By labeling each item with an FNSKU, Amazon ensures that the correct seller’s inventory is selected and shipped when a customer places an order.

Why FNSKU Over ASIN?

Prep centers, such as Stock and Ship, work with Amazon fulfillment centers to ensure precision in labeling and logistics. They strongly prefer using FNSKUs because these unique barcodes give sellers full control over their inventory and help avoid mix-ups, even within busy centers like the Amazon Fulfillment Center in Oregon.

Pros

  1. Increased Control Over Inventory

    Each item is uniquely labeled, allowing for exact tracking from prep center to customer. Sellers can confidently know that customers are receiving their specific product.
  2. Quality Assurance

    When using FNSKUs, sellers are solely responsible for their inventory, reducing the risk of counterfeit items being mistaken as theirs. This control strengthens customer trust and protects your brand.
  3. Protection Against Counterfeits

    The barcode system acts as a safeguard. Items are not mixed, so counterfeit risks are significantly reduced—an important factor when your reputation and reviews are at stake.

Cons

  1. Higher Costs

    The labeling process involves added expenses for printing, labor, and packaging materials. Sellers must evaluate whether these costs align with their profit margins.
  2. Complex Inventory Management

    Each product needs to be tracked and managed individually, which can be labor-intensive and time-consuming, especially for sellers managing large product catalogs.
  3. Potential for Fulfillment Delays
    Mistakes in labeling—such as improperly applied barcodes—can delay the intake process at Amazon Fulfillment Centers, including those in Oregon, which often operate under tight logistics timelines.

Final Thoughts

Choosing between commingled inventory and Amazon barcodes isn’t a one-size-fits-all decision. It depends on your business model, goals, and risk tolerance. If you’re prioritizing speed and lower upfront costs, commingled inventory might seem appealing. However, if brand protection, product quality, and customer satisfaction are at the top of your list, then using FNSKUs is undoubtedly the safer route.

At Stock and Ship, we work exclusively with sellers who choose FNSKUs. This approach helps us guarantee accuracy, prevent counterfeits, and maintain a high standard of fulfillment—particularly important when collaborating with major hubs like the Amazon Fulfillment Center in Oregon.

If you’re searching for a dependable 3PL partner, look no further than Stock and Ship. Our tailored services, deep industry expertise, and unwavering commitment to quality make us the trusted choice for Amazon FBA sellers across the country.

Frequently Asked Questions

The Amazon Fulfillment Center in Oregon provides faster delivery to West Coast customers and access to a major logistics hub, which can reduce shipping times and improve customer satisfaction.

Consider your business priorities—commingled inventory offers speed and reduced labeling costs, while FNSKUs provide greater control, quality assurance, and brand protection.

Yes, you can change your preference in your Amazon Seller Central account. However, you’ll need to relabel all inventory with FNSKU barcodes moving forward.

Yes, commingling can sometimes expose sellers to liability if a customer receives a counterfeit or defective item that is traced back to their listing, even if the product wasn’t theirs.

While we support fulfillment through the Amazon Fulfillment Center in Oregon, we also serve sellers using various Amazon locations nationwide, ensuring consistent prep and labeling standards across the board.

Feel free to reach out to us for further details on our services and how we can collaborate to drive sustainable growth for your business.