A domestic partnership is an interpersonal connection formed by two people who live together and share a common household but are not married. Domestic partners are entitled to advantages such as survivorship rights, hospital visiting, and others. In addition, they can adopt each other's children. Domestic partnerships are available in all 50 states and the District of Columbia. However, not all states give these relationships all of the same benefits that married couples receive. Some states provide only limited marriage-like privileges for their domestic partners. Others don't recognize domestic partnerships at all. In Arizona, there are two types of domestic partnerships: registered and unregistered. A registered partnership is similar to a civil union with some important differences. For example, registered partners are given the right to inherit property owned by either partner or by both partners jointly. They also have the right to seek medical treatment using each other's insurance coverage. Finally, registered partners are able to file joint tax returns. An unregistered partnership doesn't give its partners any legal rights or responsibilities. It cannot result in inheritance or ownership rights. Additionally, the partners do not qualify for health insurance or other tax breaks usually granted to spouses. Unregistered partnerships are used primarily when someone wants to provide some type of support to a loved one but doesn't want to get legally bound to them.