This article has information related to purchasing shipping labels from the PayPal Shipping Center. If you purchased your shipping label through Shipstation, visit our Seller Tools for more information.

Post-billing or postage adjustments are changes to the amount paid for a particular shipment by a carrier, such as USPS or UPS. These adjustments can result in additional charges or refunds to your account, depending on the adjustment.

If you are charged a post-billing adjustment, we will automatically try to charge your PayPal balance or the payment method used to purchase the original label. If we are unable to complete the transaction, you will not be able to purchase shipping labels until the outstanding balance is paid. Once you sign into your PayPal account, there will be a banner notification to assist in paying the balance.

There are several reasons why a carrier would make postage adjustments, including but not limited to:

• Incorrect package weight or dimensions: If the weight or dimensions of a package are inaccurately measured or reported, the carrier may adjust the postage to reflect the actual weight or dimensions.
• Incorrect package type: Certain carriers may have specific rules regarding the package type shipped, such as envelope or box, and may adjust the postage accordingly.
• Incorrect destination or address: If the destination or address of the recipient is inaccurate or incomplete, the carrier may adjust the postage to reflect the correct destination.
• Additional services requested: If additional services are added, the carrier may adjust the postage to reflect the cost of these services.

How do I pay for an undercharged shipment?

To pay your outstanding balance:

1. Click on the link in the email you received.
2. Or Shipping Landing Page.
3. Click More Actions.
4. Click Go to adjustments.

Follow these tips to avoid underpaid postage:

• We recommend carefully reviewing and accurately reporting all package details when sending shipments to avoid unexpected postage adjustments.
• Weight—Make sure you report the correct weights while purchasing the labels. Always round off your weights to the next number. For example, a weight of 7.2 oz is 8 oz, not 7 oz.
• Dimensions - Report accurate dimensions while purchasing labels. Dimensional weight (Volumetric weight) may apply to your packages, and providing the correct dimensions will help you avoid underpaid postage. Read more about dim weight here – https://www.usps.com/dimensionalweight/
• Correct Address – Make sure you enter the correct address and correct zip code. Any discrepancies in this would result in extra charges.
• Match the label to the packaging—Our shipping partners provide a wide range of shipping options to help you meet your mailing needs. Make sure that the label you are using matches the packaging. For example, if you are using a flat-rate box, you should also use a flat-rate label. The same goes for priority packaging. Anything in a priority mailbox requires a priority mail label.
• Double-check the zip code: Verify that the original address is up to date and that you have marked the correct zip codes for the destination, too.

How do I dispute an adjustment?

You are not able to dispute a shipping adjustment directly with PayPal. Instructions for disputing an adjustment vary by carrier.

To start the adjustment process, navigate to your Adjustments, select the adjustment you would like to dispute, and then click on the Dispute Adjustment button. A screen will pop up that will provide you with the next steps and an effortless way to copy and paste your transaction details.