When Sending an Invoice With an Attachment to Xero, the Invoice is Sent Through but not the Attachment, why?
This happens when the attachment file name includes special characters like any of the following: !@#$%^&*()?|\
If you rename the attachment, removing any special characters, and then try sending the invoice through to Xero again, it should go through.
Should you have any further issues, please contact support at firstname.lastname@example.org and provide details of the invoice and your login credentials for Tradify so the support team can investigate further.