What kind of attachments can be uploaded to an Invoice?

You can upload up to 10 attachments (each up to 3mb in size) per invoice, once the invoice has been created in Xero. We’ve successfully uploaded the following file types:

PDF files
JPEG images
PNG images
Word documents
Excel spreadsheets
Text file

A full list of file types that you can upload is available on the Xero website. You cannot currently delete an attachment in Xero from FileMaker – you will need to login to Xero to delete any attachments that have been uploaded to an Invoice.