Overages:
If your box is deemed by UPS to be heavier or larger than the weight and dimensions provided on the shipping label, you will be billed for the overage.
If you have a larger box than normal and it requires extra handling, you will be billed for the overage.
To avoid any overages, please make sure that the packages are the correct weights and dimensions. Also making sure the address for the packages are correct as well.
https://www.ups.com/assets/resources/media/en_US/peak-surcharge.pdf