When purchasing postage you are required to enter accurate data because it's what the cost of shipping is based on.
While your package is en route, USPS will verify that you've purchased the correct amount of postage for your package. They will charge your Pirate Ship account for any differences they notice.
USPS will verify your packages for accurate:
- Package Type
- Origin Zipcode
- Destination Zipcode
If differences between what you entered when buying the postage and the actual package result in an underpayment or overpayment, they will automatically charge or credit your Pirate Ship account for the difference.
APV will not turn First Class Package® into Priority Mail Cubic®
Note that the APV system does not apply Priority Mail Cubic® rates to packages which had postage for another service. This means that USPS® will essentially penalize you for entering inaccurate details. For example, if you purchase a First Class Package® label for a 15.9 ounce package with the dimensions of 7x7x3", but the package is found to actually be 17 ounces, then you will be charged the weight-based Priority Mail rate, even though the dimension-based Priority Mail Cubic® rate would have been cheaper.
Always be accurate when entering dimensions and weight!
You can avoid delays and unexpected charges by being 100% accurate when purchasing your postage.
If you have any questions or concerns about any adjustments that USPS has made to your account, just contact Pirate Ship's customer support and we'll help you figure it out.