Mexico said Wednesday its postal service was suspending package shipments to the United States ahead of an end to the exemption on tariff duties for low-value packages by the Trump administration.

The announcement follows similar moves by postal services from the European Union and several other countries to pause shipping as they await more clarity on the U.S. measure.

It also comes amid months-long negotiations between the Mexican government and the Trump administration to avoid wider tariffs.

The exemption — known as the "de minimis" exemption, which allows packages worth less than $800 to come into the U.S. duty free — is ending on Friday.

A total of 1.36 billion packages were sent in 2024 under this exemption, for goods worth $64.6 billion, according to data from U.S. Customs and Border Protection.

Mexico’s government said its postal service, Correos de Mexico, will temporarily suspend package deliveries to the U.S., starting Wednesday.

Yunnueth Hernández and her two children were among those to walk out of a postal building in Mexico City disappointed on Wednesday when they were unable to send a letter to a family member.

"I wanted to send a letter to a loved one in the U.S. to show my children how we used to communicate," she said. "Unfortunately, we couldn't send it because they told us with the tariffs, shipments to the U.S. were cancelled."

Mexico has tried to negotiate with U.S. President Donald Trump to avoid increased tariffs by taking more aggressive security measures against the country's drug cartels and sending dozens of imprisoned cartel figures to the U.S. for prosecution.