In early 2018 Chargify announced a facelift to the invoicing capabilities of Chargify. This new functionality was called Relationship Invoicing. However, users that created their account prior to 2018 were left on the older version of Chargify. The good news is that the SaaSync for Chargify integration supports both versions of Chargify - so it should not matter which version of Chargify you are on.
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