How do I add multiple emails to a Xero Invoice through Zapier?

Hi ​@Jack_Lenton 

Unfortunately Xero's API only accepts a single email address in the Email to field, so comma or semicolon separation won't work. Your instinct about duplicating the step is the right approach, create two separate Send Invoice steps, one mapped to the primary email and one to the secondary. It's a bit repetitive but it's the only reliable way to do it within Zapier's Xero integration.

Hi ​@Jack_Lenton 

You cannot send a Xero invoice to multiple email addresses in a single Zapier action. The Xero API only accepts one email address in the Email to field—using commas or semicolons will trigger the "Email address must be valid" error.

Why this happens:
Xero's "New Invoicing" system explicitly rejects pasted lists of multiple email addresses, even within Xero itself . This limitation carries over to the API that Zapier uses.

Solution: Use two separate "Send Sales Invoice by Email" actions

1. First action: Create the invoice in Xero

2. Second action: Send invoice to primary email address

3. Third action: Send same invoice to secondary email address (using the same Invoice ID from step 1)

Alternative workaround (for more control):
Use Email by Zapier instead of Xero's email action. You can send to multiple recipients (To, CC, BCC) and attach the invoice PDF, though this won't mark the invoice as "Sent" inside Xero's activity history 

If you're still running into issues, drop a screenshot of the error and a quick description of what your Zap is doing, happy to take a look!

And if you'd rather just get it sorted quickly, I offer a free 20-min Zapier troubleshooting call. Book it under Resources on my Zapier Directory profile: https://zapier.com/partnerdirectory/automatemybiz

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