You need to tell each court, in writing, that you have a conflict and cannot be in two separate places at the same time on the same day. Each court will want to see the document requiring your appearance in the other court, so make a copy. If you get to one court at 9am, and get finished, you can likely get to the other court before noon and do it that way.
But if you don't advise each court of the issue you are likely to get defaulted and the consequences will be worse than what will happen if you try to get there.
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I agree with both answers and letting the clerk and the other side know is the first step. Hiring a lawyer is the second.
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