A child custody agreement can be one of many agreements between the parties to resolve education and wealth issues after a relationship has failed. Before such an agreement is concluded, it is necessary to carry out a careful examination, while emphasising that the conclusion of such an agreement in any event entails advantages and disadvantages. Section 135 of the Taxation Act sets out the circumstances in which the court may annul a compulsory child support agreement. These reasons include a “substantial change in circumstances”; the annual rate of subsistence of children is not appropriate or appropriate; or the binding agreement on child support was concluded for reasons of fraud, unlawful influence or unscrupulous behaviour. As a rule, an application is made to the family court on the basis of a change in circumstances. The Tribunal decided that it was required to consider whether the harshness was so serious and resulted in such injustice that it could only be corrected by the extreme measure of the annulment or amendment of an existing injunction and, in that case, the financial evidence relied on by the applicant was not sufficient to support the father`s assertions as to his change in financial situation, and the appeal was dismissed. In the case of Lincoln  FCCA 18, a mandatory child support contract was cancelled in circumstances in which the father`s business was put into liquidation three months after the signing of a binding child support contract (and the evidence supported this assertion). These are formal written agreements signed by both parents. Parents are not obliged to get legal advice before this type of agreement is concluded, but they must meet these two conditions: that they have much more difficulty in terminating a mandatory child support agreement and that they must ensure the safety and finality of the issue of child support. .