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In the United States, domestic partnership is a city-, county-, state-, or employer-recognized status that may be available to same-sex couples and, sometimes, opposite-sex couples. Although similar to marriage, a domestic partnership does not confer any of the myriad rights and responsibilities of marriage afforded to married couples by the federal government. Domestic partnerships in the United States are determined by each state or local jurisdiction, so there is no nationwide consistency on the rights, responsibilities, and benefits accorded domestic partners.
Couples who live in localities without civil unions or domestic partnerships may voluntarily enter into a private, informal domestic partnership agreement, specifying their mutual obligations; however, this involves drawing up a number of separate legal documents, including wills, power of attorney, healthcare directives, child custody agreements, etc., and is best done with the guidance of a local attorney. Without governmental enforcement of the agreement, all such provisions of the partnership may be ignored by hospitals, healthcare professionals, or other persons, and may be held invalid by state courts in disputes over child custody or over a deceased partner's estate.