Whatnot will bill sellers for USPS weight adjustments from Nov 4
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Whatnot will bill sellers for USPS weight adjustments from Nov 4
For US shipments sent on or after November 4, 2026, USPS charges for packages that weigh more than their Whatnot-generated label go to the seller's Whatnot ledger. Until now Whatnot absorbed them. For now Whatnot still covers dimension and hazmat adjustments, and it doesn't pass on UPS adjustments yet. Sellers whose first sale was on or after Sept 5, 2026 aren't part of this rollout, and neither are sellers who use their own labels.
Your net on a $10 / $25 / $50 sale: n/a / n/a / n/a
Not a set fee. You pay USPS's charge only when the packed box weighs more than the label says. To avoid it, weigh the packed box and fix the shipping profile before you buy the label. You have 45 days to appeal a charge, and USPS decides the appeal.
Source: Whatnot help: Review and appeal carrier adjustments · verified
Cite this
The Reseller Index change tracker, "Whatnot will bill sellers for USPS weight adjustments from Nov 4," https://resellerindex.com/changes/whatnot/2026-11-04-whatnot-carrier-weight-adjustments/, verified Oct 14, 2026. Free to reuse with a link (CC BY 4.0).
More Whatnot changes
- Whatnot Premier Shops lose their 10% commission discount on Nov 1
- Whatnot reprices USPS international shipping for US sellers
- Whatnot moves to volume tiers: commission falls as four-week sales grow
- Whatnot hands buyer problems to sellers: Seller Provided Support for all US accounts
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