A carrier adjustment is an additional charge or credit that occurs when a shipment’s booked details do not match a shipment’s actual details. Adjustments are calculated by the carrier and occur regardless of where and when you purchase shipping. 

Here are a few common reasons adjustments happen:

• Dimensions or weight differ from those originally entered.
• Package dropped off from a different address.
• Address required correction prior to delivery.
• Dimensions or weight exceed the maximum allowed.

See also

• How do I prevent carrier adjustments?
  
• What if a carrier adjustment is wrong?
• How do I dispute a carrier adjustment?