How to Subpoena Bank Records

My question involves a child custody case from the State of: California. Last month my ex wife lost her job and went on cash aid and welfare assistance. Naturally the Dept of Child Support comes after me for healthcare and child support, and they also find an old order that was never modified. So they say I owe arrears on a time period from 2/09-5/10 for 850 a month. However I did pay her money during that time period but unfortunately I lost all my bank statements from that time during a fire. So now my bank says they can only go back 7 yrs on the customer service computers but if I want the old archived files I have to subpoena the records. I can't afford an attorney and pretty much do everything on my own. I was hoping this forum can help me write something up or help me with the proper verbiage on subpoenaing my own bank records. How do I word it so it is official and doesn't get rejected. Thanks

Just to clarify, are you claiming you paid her child support for that time period, or that you were just paying her money on your own without going through Child Support Enforcement?

Have you asked your ex-wife if she'll stipulate that you paid that support, and that you don't owe arrears from that period?

California has a range of standard form subpoenas. You can't issue one yourself -- you would have to complete the subpoena, have it approved by the court, and then serve the court-approved subpoena upon the bank. You are looking for bank records for the account you used (which you would identify by name and account number) from a specific range of dates.