In California, a contested divorce means that the couple does not agree on the resolution of the issues. It does not matter if they disagree on some or all of the resolutions if there is at least one point of contention a divorce is considered contested.
There are three reasons why a divorce becomes contested in the state of California. The first is a factual disagreement and the second is a legal disagreement. However, the most pertinent reason is the refusal to settle the issues, such as child custody, spousal support, asset disbursement, etc.