Xero POST Invoices/{InvoiceID}/Email breaking change date

Name: Xero: POST Invoices/{InvoiceID}/Email (Breaking change)
Start: 2027-01-14
End: 2027-01-14

POST Invoices/{InvoiceID}/Email returns 429 instead of 500 when the daily invoice email limit is reached, with no Retry-After header.

88days left

Change: Breaking change
Effective: Jan 14, 2027
Replacement: Handle HTTP 429 Too Many Requests as a retriable condition instead of a 500 error
Source: developer.xero.com
Vendor's words: Upcoming breaking change: When an organisation reaches its daily limit for sending invoice emails, POST Invoices/{InvoiceID}/Email will return a 429 Too Many Requests response instead of a generic 500 Internal Server Error. No Retry-After header is included. What you need to do: Handle 429 on this endpoint as a temporary, retriable condition, not a failure. The limit is daily, so don't retry immediately, queue the se…

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