Refund of Unused Labels
When you use your Teapplix provided USPS account, any labels that are printed but not used, will be automatically refunded, subject to best efforts of Teapplix and it's partners, between the 28th and 30th day after label is printed.
Such refunds are called "Automatic Refund Requests". After such refunds are submitted to USPS, your account will be credited the actual postage on the label minus a handling fee of 20%.
If you do not want to be subject to the 20% surcharge, make sure you submit refund request to any unused label from Teapplix UI or Teapplix API, on or before the 27th day after printing.