In September 2024, the American Civil Liberties Union (ACLU) filed a lawsuit seeking a preliminary and permanent injunction, as well as a declaratory judgment, allowing potential voters to register, through October 6.

[5] On October 1, the US District Court dismissed the lawsuit on the basis that the ACLU failed to demonstrate that the September 21 voter registration deadline constituted an unconstitutional disenfranchisement or a manifest injustice that justified the intrusion of the United States federal government.

[6] On October 7, 2024, the New Progressive Party (PNP) requested the court to order the State Commission on Elections to “immediately validate all applications for mail-in and advance ballots” that were not processed within two business days.

[8] On October 8, 2024, Electoral Commissioner Aníbal Vega Borges requested the court to immediately validate all applications for postal and advance voting received and not processed within the established deadline.

[13] On October 22, 2024, the PNP filed a complaint against members of the Movimiento Victoria Ciudadana, for alleged violation of the electoral code, after having created an electronic platform for searching for voter numbers.

[16] On the same day, a judge of the San Juan Court of First Instance ordered the State Commission on Elections to continue "without interruption" the counting of early votes, thus opening the door to the process taking place without the presence of representatives of all the conflicting parties.

The Puerto Rican Independence Party (PIP) and the Alliance, appeal to the Court of First Instance of San Juan to review the decision of the State Electoral Commission (CEE).

[26] On December 27, 2024, the San Juan District Court orders the State Election Commission to adjudicate and count all direct votes, pushing back the official date for certification of the results.