We have posted the steps necessary whenever you need to change your legal name and EIN with Authorize.net. Please let us know when you are ready to move forward. Our support email is firstname.lastname@example.org or can call call the office 626-248-8837. Have a great day.
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An Account Owner for the account will need to contact us via chat, phone or eTicket to update the business name. To update the tax ID they'll need to complete the form located at http://www.authorize.net/files/newowner.pdf and fax it to the number on the form.