The update-contact HTTP POST function is a system for Infusionsoft to notify Memberium that an update has been made to the contact, and that Memberium needs to update the contact’s records. This is a more efficient system than having Memberium constantly check for updates. It’s also more efficient than using the [memb_sync_contact] shortcode, which will resync the contact everytime the page it’s on displayed, and not only after changes.

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