Mexico is developing a mobile phone app that migrants can use to alert family members and local consulates if they believe they are facing detention in the United States, the country’s foreign minister announced Friday.

The app is expected to be available in January when President-elect Donald Trump takes office, having vowed to begin mass deportations of migrants living in the U.S. without legal permission on the first day of his second term.

The app – called “Alert Button” – allows nationals who believe they are facing detention to inform the “consulate closest to their location about situations of impending detention, notify pre-selected family members and contact the relevant authority “Foreign Minister,” the Mexican Foreign Ministry said in a press release.

The app was developed with the Mexican Digital Transformation Agency for “emergencies,” said Juan Ramón de la Fuente, Mexico’s foreign minister.

De la Fuente outlined additional safeguards ahead of possible detention of Mexican nationals under the new Trump administration.

“The Secretary of State strongly advised that the removal of an individual from the United States requires a court order, a final judgment of removal or deportation, and that the consular team will be very clear that due process is followed. ” says the press release.

Trump has repeatedly promised to begin mass deportations as soon as he takes office.

He has tapped several immigration hardliners for key Cabinet positions, including former acting U.S. Immigration and Customs Enforcement director Tom Homan as “border czar.”

Homan previously discussed his vision for mass deportations, saying they would initially focus on expelling criminals and threats to national security. He did not rule out deporting families together.

According to the Center for Migration Studies, there are an estimated 11.7 million illegal migrants living in the United States without legal immigration status as of July 2023, including approximately 4.6 million from Mexico.