Understanding FBA Box Numbering
When creating an FBA inbound plan, Amazon assigns its own box numbers to your shipment. These numbers do not necessarily follow the same order as the internal box numbers in PrepBusiness.
Why the Numbers Differ
Amazon receives your box contents and determines its own box sequence based on how it processes the shipment plan. PrepBusiness has no control over the order Amazon assigns to each box.
For example, the box you created as box 4 in PrepBusiness may be assigned box number 1 by Amazon. This is expected behavior and is not a bug.
How to Match Labels to Boxes
To make it easy to apply the correct label to each box, PrepBusiness overlays the internal box number on each FBA shipping label. Look for the internal box number printed on the label — this tells you which box in your shipment the label belongs to.
- Print your FBA box labels from Step 7 of the Arrange Transport workflow.
- Each label displays the Amazon-assigned box number (e.g., "1 of 6") as well as the PrepBusiness internal box number as an overlay.
- Use the internal box number overlay to identify which physical box the label corresponds to, then apply it to the correct box.
Will This Cause Routing Issues?
No. Amazon routes each box to the correct fulfillment center based on the destination address printed on the shipping label, not the box sequence number. As long as each label is applied to the box that matches its internal box number overlay, your shipment will be routed correctly.