Precedent has been set with respect to notification the US federal government has lost the sovereignty delegated to it by the people and the states. A complaint with allegations challenging the US federal government maintenance of its delegated powers is all that is required. A complaint filed in federal court and responded to by the DoJ is all that is necessary to notify the entire US federal government the President is ineligible.
All debts contracted and engagements entered into, before the adoption of this Constitution, shall be as valid against the United States under this Constitution, as under the Confederation.
This Constitution, and the laws of the United States which shall be made in pursuance thereof; and all treaties made, or which shall be made, under the authority of the United States, shall be the supreme law of the land; and the judges in every state shall be bound thereby, anything in the Constitution or laws of any State to the contrary notwithstanding.
The Senators and Representatives before mentioned, and the members of the several state legislatures, and all executive and judicial officers, both of the United States and of the several states, shall be bound by oath or affirmation, to support this Constitution; but no religious test shall ever be required as a qualification to any office or public trust under the United States.
Delegated authority by the people to the US federal government is withdrawn when the people elect an ineligible President. The ineligible President remains in office while the US federal government is removed. The US federal government is a servant of the people. For some oddball reason, many people believe their servants can’t be fired after a vote of the majority.