Legal Definitions - ad fidem

Ad fidem is a Latin legal phrase meaning in allegiance, under allegiance, or owing allegiance. It describes a state where an individual or entity is bound by loyalty, duty, and fidelity to a sovereign, a state, or a governing authority. It signifies that one is under the jurisdiction and protection of that authority, and in return, owes obedience and commitment.

• Example 1: Citizenship by Birth

  When a child is born within the territorial borders of a country that grants citizenship based on place of birth (often called jus soli), that child is immediately considered ad fidem of that nation. This means they are automatically under the allegiance and protection of the country's laws and government, and in return, owe loyalty and duty to that state from birth.

• Example 2: Military Oath of Service

  An individual who enlists in the armed forces of their country takes a formal oath to support and defend the constitution and laws of that nation. By taking this solemn oath, the service member places themselves explicitly ad fidem of the state. They formally declare their allegiance and commitment to uphold the country's foundational laws and serve its interests, often at great personal sacrifice.

• Example 3: Naturalization Ceremony

  When an immigrant successfully completes the process to become a citizen of a new country, the final step often involves taking an oath of allegiance. During this ceremony, the individual formally declares themselves ad fidem of their new homeland. They renounce previous allegiances and commit their loyalty and duty to their adopted country, accepting its laws, protections, and responsibilities.