Oshippy

Carrier Adjustments Policy

Last updated: October 21, 2026

What is a carrier adjustment?

After your package is in the carrier's network, it may be weighed and measured. If the actual weight or dimensions differ from what was declared when you purchased the label, the carrier may charge an adjustment fee. This is standard industry practice for USPS and UPS.

An adjustment means the declared weight or size did not match the package the carrier accepted. Who pays that difference depends on who bought the postage.

Common causes

  • Package weighs more than declared
  • Dimensions are larger than declared (dimensional weight)
  • Incorrect service level or zone
  • Non-machinable package characteristics

How Oshippy helps prevent adjustments

Oshippy uses package presets and item photos to estimate weight and size. You review and confirm these estimates before checkout. We flag low-confidence estimates and ask you to double-check when needed. However, you are ultimately responsible for accurate declarations.

Who is billed

When postage is purchased on your Shippo account, Shippo bills the adjustment to that account. Oshippy does not collect that adjustment. Label and postage questions go to Shippo.

New labels use your connected Shippo account. Oshippy does not request authorization to charge your card for those postage adjustments. Historical labels bought on Oshippy’s account remain subject to the agreement and billing authorization recorded at their original purchase. Contact Oshippy about those transactions.

Policy version 1.3.0

Disputes

For postage on your Shippo account, contact Shippo support with your tracking number and shipment details and follow its dispute instructions and deadlines. Carriers make final determinations on adjustment validity.

Before you ship

At checkout, you confirm accurate packed weight, outside dimensions, and contents, and acknowledge that Shippo bills any carrier adjustment to your connected Shippo account. See our Safety page for required confirmations.

Contact

Questions about a specific adjustment? Contact support with your tracking number.