According to the contract law, a contract concluded by fraudulent means is invalid if it harms the interests of the state.

Article 490 of the Civil Code Where the parties conclude a contract in the form of a contract, the contract is established when the parties sign, seal or press their fingerprints. Before signing, sealing or fingerprinting, one party has fulfilled its main obligations, and when the other party accepts it, the contract is established, but the signature obtained by deception is not established.