While syncing Rerun to Xero, you will need to watch for any error messages that are displayed during the sync process.  These messages will point to the reason that the transaction did not sync into Xero.  Once these errors have been addressed, you can successfully sync these Rerun transactions to Xero.

Merging Contacts

You cannot merge contacts in Xero for Rerun, otherwise, you’ll receive a syncing error and will not be able to successfully sync your Rerun transactions over to Xero.

Archiving Contacts

You’ll need to un-archive the old contact in Xero in order to successfully sync Rerun transactions over to Xero. If a contact is archived in Xero, you’ll receive an error during the syncing process because Rerun does not automatically archive contacts that have been archived in your Xero instance.

There is a possibility that you receive no error message, but you are missing Rerun transactions in Xero.

Having no billing address does not stop Rerun from successfully processing the payment stream transactions, however, it will prevent the Rerun transaction from being synced into Xero. The simple solution is to be sure that all your customers have a billing address recorded on their Rerun customer card. Once the Rerun customer card has a billing address, the transaction will be successfully synced into Xero.