Yes, writing a bad check is a criminal offense in Kansas. Therefore, if convicted, you can serve jail time. Normally this does not happen. Most prosecutors will have a bad check policy under which the criminal case will be dismissed upon payment of the checks and associated costs. I wonder about the statement that the checks were written when you were under age. Normally being under age restricts your ability to enter contracts. It makes me wonder if something else is going on. You should speak with a local attorney about the local programs offered by the prosecution and address the age issue.
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If I'm not mistaken, Dick Hickock, one of the "In Cold Blood" murderers was in jail for kiting checks when he met his partner Perry Smith. And that was in Kansas. So, yes, it's possible.
**Disclaimer: Charles F. Basil is licensed in CT only. Any opinion given is based upon the general principles of law, but local laws may vary. This opinion is given for informational purposes only, and no attorney client relationship has been formed. Opinions on a website can not and should not supplant the advice of an attorney presented with all of the facts in your jurisdiction.**