You can call the police. If the IOU is written under the condition of being cheated, according to the law of our country, the contract and IOU written by the parties due to coercion or deception belong to the civil legal act against the true meaning of the natural person, and also belong to the revocable civil legal act. You can call the police or directly apply to the people's court for cancellation.

Those who are cheated by others to sign IOUs can be dealt with in the following ways:

(1) The parties may apply to the arbitration institution or the people's court for cancellation of the IOUs, but they shall bear the burden of proof, and the IOUs will be invalid after cancellation;

(2) If writing an IOU by deception constitutes a crime, the party concerned may report the case to the public security organ, and the party concerned shall collect relevant evidence before reporting the case.

Legal basis:

Article 150 of the Civil Code?

If one party or a third party coerces the other party to carry out a civil legal act against its true meaning, the coerced party has the right to request the people's court or an arbitration institution to cancel it.

Article 155 of the civil code?

An invalid or revoked civil juristic act is not legally binding from the beginning.