Remember that for termination of the contract of purchase-sale of the apartment and the recognition of the transaction invalid must be a good reason. For example, the use in the transaction by the second party Palevyh documents (passport or fake power of attorney), infringement of the rights of minors, nesposobna or capable limited. If during the transaction one of the parties was in a state of alcohol (drug) intoxication or in a state of mental disorder, the transaction will be considered invalid. The transaction was deemed invalid if it is deemed onerous, i.e. if the contract was signed fraudulently or under duress.
If you terminate the contract of purchase-sale of the apartment voluntarily with the consent of both parties, please refer to the notary that the contract is identified. The notary will constitute a separate contract on termination of the contract of purchase–sale and attach it to the main contract, which is in his files. In this case, you will need the same documents as in the contract of purchase-sale of the apartment.
If you require cancellation of the contract of purchase-sale of apartments in unilaterally, then first conduct a pre-trial settlement, that is, invite the other party to voluntarily terminate the contract and assign a deadline.
If the other party refused the termination of this agreement within the prescribed period, refer the claim to the court, which shall decide on the recognition of the contract of purchase–sale of the apartment invalid and its termination under paragraphs 1, 2 of article 450 of the Civil Code of the Russian Federation.
Remember that for termination of the contract the law establishes a term of 3 years. This is the Statute of limitations for contracts of purchase–sale of the apartment, which is calculated from the time of the transaction.
Any agreement must be made in accordance with the requirements of law, especially real estate transactions. Try to provide all the nuances in its conclusion.