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.
20

This happened to me too! I have 19 of these bogus $22 or $21.67 charges, and over half of them are for packages that I’ve overstated the weight on. I was refused to be given an immediate refund, which is completely unacceptable since it’s obviously some sort of horrible glitch. We need to spam their Twitter Support page, and that’s exactly what I’m doing now on their most recent tweet. Their own chat support told me that there could be as many as 50,000 of these bogus charges to people - which is over a million dollars worth of outright theft! I understand that mistakes happen, but take responsibility for them and give people back their money immediately. I saw a comment here where someone had lost $5000 - charges like that can absolutely ruin a business’s bank account and that is simply criminal. I couldn’t believe I was being told no, that I wasn’t going to get back the over $400 that they stole from me, and that I had to wait until it was reviewed by their technical team. No timeline given for a refund whatsoever. Are you kidding me?!

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