You first posted this under Ohio. Now in California. State laws make a difference. In Ohio an attorney has the authority to issue a subpoena.
If you do not have an attorney, the clerk of court will have to issue the subpoena as a lay person may not issue one. Most clerks will require that the judge be involved, so simply seek leave of court in your pending case to proceed.Ask a similar question
If your ex's attorney was supposed to do this, then they can be held for contempt. That is where you can start. YOu can also file a motion to have you ordered to get the QDRO done. A subpoena isn't what you need to do. Seek legal assistance on this.Ask a similar question
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