As an existing customer, where can I find instructions for updating previous versions of my API's?

Most of the information existing customers will need - including specifications and walkthroughs can be found on the Equifax for Developers API portal. Instructions for migrating previous formats, such as FFF/XML are available after requesting and entering the Partner Product Access code on your portal Dashboard. You can also access video tutorials located in the Resources and Training tab on the  Equifax public transformation site.

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