USPS: CustomsLables vs InternationalLabels

What is the difference in the CustomsLables and InternationalLabels components?

When to use CustomsLabels:
  • When the shipping label has been acquired from another source
  • When shipping to APO/FPO addresses.
When to use the InternationalLabels component:
  • When sending International Priority, International Express, or International First Class mail.

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