See Rule 52, Arizona Rules of Family Law Procedure. You are responsible for all reasonable costs, which means .10 per page of copies, plus any special copy costs, plus $10 per person per hour for copying, plus service and subpoena issuance of $27. A letter of explanation can be sent with the subpoena. If cost is a factor you could request to limit the time frame, check numbers, or ask that they call you first if they anticipate the fees going over a specific dollar amount.
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Rule 52 of Arizona Rules of Family Law Procedure govern the issuance of subpoenas. Typically, banks are served by certified mail to one of the large statutory agents. You can check with the Arizona Corporation Commission to determine which stat agent to send the subpoena to. The big ones are CSC and CT Corp. If there is a different statutory agent, they will be listed on the Corporation Commission website. For bank records, you can also send formal discovery to the other party requesting that they produce the documents or they may be required to produce them as a part of their Rule 49 disclosure.
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