De Ruyter Divorce & Family Law Lawyer, New York

A mistake by both spouses in a marriage that can serve as grounds for an annulment. For example, if one spouse went into the marriage wanting children while the other did not, they have a misunderstanding that will be judged serious enough for a court to terminate the marriage.

The entitlement of all children to be supported by their parents until the children reach the age of majority or become emancipated -- usually by marriage, by entry into the armed forces or by living independently. Many states also impose child support obligations on parents for a year or two beyond this point if the child is a full-time student. If the parents are living separately, they each must still support the children. Typically, the parent who has custody meets his or her support obligation through taking care of the child every day, while the other parent must make payments to the custodial parent on behalf of the child -- usually cash but sometimes other kinds of contributions. When parents divorce, the court almost always orders the non-custodial parent to pay the custodial parent an amount of child support fixed by state law. Sometimes, however, if the parents share physical custody more or less equally, the court will order the higher-income parent to make payments to the lower-income parent.

The test that courts use when deciding who will take care of a child. For instance, an adoption is allowed only when a court declares it to be in the best interests of the child. Similarly, when asked to decide on custody issues in a divorce case, the judge will base his or her decision on the child's best interests. And the same test is used when judges decide whether a child should be removed from a parent's home because of neglect or abuse. Factors considered by the court in deciding the best interests of a child include: age and sex of the child mental and physical health of the child mental and physical health of the parents lifestyle and other social factors of the parents emotional ties between the parents and the child ability of the parents to provide the child with food, shelter, clothing and medical care established living pattern for the child concerning school, home, community and religious institution quality of schooling, and the child's preference.

An arrangement by which parents who do not live together share the upbringing of a child. Joint custody can be joint legal custody (in which both parents have a say in decisions affecting the child) joint physical custody (in which the child spends a significant amount of time with both parents) or, very rarely, both.

Any divorce in which the spouse who wants to split up does not have to accuse the other of wrongdoing, but can simply state that the couple no longer gets along. Until no-fault divorce arrived in the 1970s, the only way a person could get a divorce was to prove that the other spouse was at fault for the marriage not working. No-fault divorces are usually granted for reasons such as incompatibility, irreconcilable differences, or irretrievable or irremediable breakdown of the marriage. Also, some states allow incurable insanity as a basis for a no-fault divorce. Compare fault divorce.

A lie by one spouse before marriage that provides grounds for an annulment. For example, if a spouse failed to mention that he was still married or was incapable of having children, he has misrepresented himself.

The legal termination of marriage. All states require a spouse to identify a legal reason for requesting a divorce when that spouse files the divorce papers with the court. These reasons are referred to as grounds for a divorce.

In most states with fault divorce, grounds for a spouse not in prison to obtain a fault divorce if the other spouse has been imprisoned for a certain number of years.