Shipments with underpaid postage may result in transit delays, postage dues for your recipient and/or postage adjustments from the carrier. There are three main considerations for avoiding underpaid postage:

Selecting the correct return address / Chit Chats Region

  • Ensure you are creating shipments with the correct return address information. Always make sure your account displays the correct Chit Chats region to ensure postage prints with the correct return address for your region. 

Accurately entering the weight and dimensions of the shipment

  • Always weigh and measure your shipments after packaging them. While your packaging may not weigh very much, a discrepancy of 100 g can make a large difference. Depending on the overall weight and service, your packaging may put your shipment into a different weight class for postage.
  • Accurately measure the length, width and height of your shipments as dimensional weight may apply. For irregularly shaped parcels, dimensions should be measured as if the piece was rectangular.
  • Measure the weights of your shipments on an accurate and calibrated package scale. Always round up:
    • To the nearest pound for U.S. postage. Ex. 7.2 lbs should be rounded to 8 lbs.
    • To the nearest ounce for international postage and shipments less than 1 lb. Ex. 4.8 oz should be rounded to 5 oz.
    • To the nearest 500 g for Canadian postage. Ex. 700 g should be rounded to 1000 g (1 kg).

If you import shipments from your store:

  • Make sure that the product entries for all of your SKUs contain the correct weights and dimensions including your packaging. 
    • Ex. If you use our Shopify integration for your shipments and you want to ship a 450 g book in a 100 g envelope, your product entry should list this SKU at 550 g.
  • Verify the accuracy of all information. It is the shipper’s responsibility to provide accurate information as any inaccurate information can result in:
    • Postage adjustments due to insufficient postage
    • Possible shipping delays
    • Undeliverable shipments (returns)
    • Additional administrative fees 

Choosing the correct service for your shipment / packaging 

  • USPS Media Mail postage can only be purchased for shipments solely containing qualifying media content.*
  • USPS First Class Mail can only be used for packages less than 1 lb.
  • USPS Priority Mail packaging can only be used with Priority Mail postage. This extends to Priority Regional Rate and Priority Flat Rate packaging as well.*

We encourage you to learn more on calculating correct postage from USPS or you can check out our tips on how to properly package your shipments.

*Service availability may vary.