Avoid These 7 Costly Prep Mistakes When Selling on Amazon FBA
- Farhan Shaikh
- Apr 23
- 3 min read
Updated: Apr 29
Selling on Amazon through Fulfillment by Amazon (FBA) offers an exciting opportunity for many aspiring entrepreneurs, but the road to success is not without challenges. Even small errors during the preparation phase can lead to significant setbacks, including rejected shipments, increased fees, and potentially account suspensions. To help you navigate this journey smoothly and profitably, here are seven critical prep mistakes that can cost you dearly.

❌ Incorrect or Missing FNSKU Labels
Labeling is a frequent pitfall for Amazon sellers. FNSKU labels are crucial as they identify products and ensure accurate tracking in Amazon's system. If these labels are incorrect or missing, you may face shipment rejections and delays. For instance, a survey showed that nearly 20% of sellers encounter issues due to labeling errors, which can result in thousands of dollars lost, depending on the volume of your shipments.
❌ Non-Compliant Packaging
Proper packaging is key to adhering to Amazon’s policies. For example, failing to include suffocation warnings on plastic bags can result in serious compliance issues. A study found that 15% of Amazon sellers reported having their products rejected due to improper packaging. Always review Amazon's packaging guidelines and double-check your products to avoid these costly mistakes.
❌ Sending in Damaged or Used Items
Maintaining a high-quality standard is essential when selling on Amazon. Sending damaged or used products violates Amazon’s policies and can lead to negative reviews, account flags, or even suspension. For instance, sellers with even a small percentage of negative reviews often see a 30% drop in sales. Always inspect and ensure your items meet quality standards before shipping to foster positive customer experiences.
❌ Mixing Inventory Across SKUs or Conditions
Organization is vital for successful FBA management. Mixing inventory from different SKUs or conditions complicates the fulfillment process, leading to errors and potential account problems. A staggering 25% of sellers admit to facing issues due to disorganized inventory. Implement a clear sorting system, either by using bins or label systems, to keep your products distinct and easily trackable.
❌ Ignoring Amazon’s Box Weight & Size Limits
Amazon enforces strict box weight and size limits for FBA shipments. Disregarding these limits can lead to additional fees or shipment rejections. For instance, if your box exceeds the 50 lbs limit, you may incur a $10 additional fee per box for improperly prepared shipments. Always review and adhere to these specifications when preparing your packages to avoid unnecessary costs.
❌ Failing to Poly Bag Liquids or Fragile Goods Properly
Proper packaging for liquids and fragile items is crucial to preventing damage during transit. If you neglect to use poly bags or suitable packing materials, you risk spills, breakage, and shipment rejection. Studies indicate that 40% of damaged items are due to improper packaging methods. Take the extra time to ensure these items are securely packaged to protect your investment and maintain customer satisfaction.
❌ Skipping Quality Checks Before Shipment
Neglecting quality checks may lead to significant issues down the road. Quality control ensures items are sellable and compliant with Amazon's standards. Sellers who skip this step can experience a 20% decrease in sales and face account issues. Always conduct thorough inspections of your products before shipment to catch any potential problems early.
Taking Action for Success
Navigating the competitive landscape of Amazon FBA requires diligence and attention to detail. By addressing these seven costly prep mistakes, you can maintain a profitable and compliant selling experience. Establishing a systematic approach or working with a reliable prep center can further streamline your process and minimize risks.
At The Discount Prep, we support Amazon sellers with compliance and shipment preparation. From accurate labeling to proper packaging and quality checks, we offer a suite of services designed to simplify your FBA experience. Focus on getting your business off to a great start by prioritizing effective prep strategies.
For more information about how we can assist you on your Amazon FBA journey, visit our website.
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