Thank you for your question. I look forward to working with you to provide you the information you are seeking for educational purposes only.
What you are saying above is not a countersuit, that is a defense to the suit filed against you. You do not have a countersuit, you have defenses to the invalidity of the note.
When you go to court, these are your DEFENSES, not countersuit issues:
1. It is not dated by me or my uncle, the only date is by the notary who signed it.
2. It does not include my address or my uncle's address.
3. It does not include any interest or penalty for non-payment.
4. I signed the promissory note under duress.
5. I do not believe my uncle has the ORIGINAL, he stated in a text message to me yesterday that his attorney has the original, but I read online that if he is unable to produce the original document, that it becomes invalid.
If court is tomorrow, it is too late to file a written answer today and it is not required for small claims anyhow. You need to appear and bring your proof of each of the claims you are making above for your defense. Make sure you have your witnesses with you as well to testify to any of the above issues to invalidate the note you signed.
A countersuit is if your uncle had done something to owe you money, such as he breached a contract
with you and owes you money, that is not what you are saying above, you are just saying you have reasons for not paying and legal grounds for not paying.