Experiencing unusual USPS label price adjustments?

Shopify Discussion
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Topic summary

On July 4th around 7:30 PM, numerous Shopify merchants experienced a massive wave of fraudulent USPS shipping label adjustments, with charges ranging from hundreds to thousands of dollars. One seller reported over 30 adjustments totaling $700, while another was hit with approximately $5,000 in unexpected charges.

The Issue:

  • Adjustments cited incorrect weight/dimensions, but merchants had intentionally rounded up weights to avoid such charges
  • Many packages showed impossible weights (0.16 oz—less than an empty box)
  • Charges of $22+ appeared on First Class packages where dimensional weight doesn’t apply
  • Dimension discrepancies were fractions of an inch that wouldn’t affect pricing

Merchant Frustrations:

  • Initial support responses were unhelpful, directing sellers to contact USPS or file claims themselves
  • Shopify holds the merchant shipping account, making independent dispute filing ineffective
  • Charges processed during regular billing cycles despite the acknowledged error
  • Some merchants incurred overdraft fees and had to postpone sales/shipments
  • Support estimated 12k-50k adjustments were impacted (potentially $1.1M+ in erroneous charges)

Resolution:

  • Shopify eventually confirmed a USPS billing system error affecting July 4-5 shipments
  • Refunds/credits were promised and began rolling out
  • Merchants expressed anger over lack of transparency, delayed communication, and inadequate compensation for secondary damages (overdraft fees, lost sales)
  • No claims filing with USPS required for affected merchants
Summarized with AI on November 2. AI used: claude-sonnet-4-5-20250929.
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I just wanted to address the issue of shipping until the shopify imbroglio is rectified. I suggest you continue to sell and use Pirateship, you can download the app on your shopify, that way it links the order and you won’t have to enter tracking manually. I have since switched to using pirateship 100% since this issue happened. I do not trust shopify shipping any longer. To be honest, pirateship postage is cheaper than shopify if you’re shipping anything over 1lb and its the same charge for packages less than 1lb.

We are small businesses, and we need to sell to meet our commitments to our customers and ourselves. So, just something to consider.