Hello everyone,
I was curious if anyone has found a clever solution to this issue.
We have custom NSA rates through USPS, and their API sometimes rejects the email addresses that Amazon orders automatically generate. We sell across multiple platforms, so this doesn’t affect every order, but at our current volume, it happens at least once a week.
The root problem is that Amazon masks customer emails for privacy by generating random UUID-style addresses. Occasionally, these end up longer than the USPS API’s email field limit (30 characters), and the request fails with an error like this:
OASValidation OpenAPI-Spec-Validation-Labels failed with reason:
[ERROR - Path '/customsForm/importersContact'] String is too long (length: 38, maximum allowed: 30)
Has anyone found a way to handle this gracefully?
Some ideas I’ve considered or would love feedback on:
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Automatically truncating or sanitizing the importer contact email before sending to USPS
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Using a static fallback contact (like a company email) for Amazon orders
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Seeing if USPS can raise this field limit on NSA integrations
Would appreciate any insights or best practices from others who’ve run into this with Amazon or USPS label APIs.
Thanks!
