An open letter from Apple employees and shareholders demands the tech giant stop matching employee donations to organizations with ties to the Israeli military assault on the Gaza Strip and ongoing illegal settlement development in the West Bank. The letter, building on a previous demand by Apple employees for a ceasefire in the conflict, calls on the company to “promptly investigate and cease matching donations to all organizations that further illegal settlements in occupied territories and support the IDF.”

As with many large corporations, Apple employees can make donations to a number of nonprofit organizations and receive matching contributions from their employer through a platform called Benevity. Among the charitable organizations eligible for dollar-matching from Apple are Friends of the IDF, an organization that collects donations on behalf of soldiers in the Israeli military, as well as a number of groups that contribute to the settlement enterprise in the West Bank, including HaYovel, One Israel Fund, the Jewish National Fund, and IsraelGives.

Apple did not respond to a request for comment.

“Unfortunately, there has been very little scrutiny into 501(c)(3) organizations that openly support illegal activities in the West Bank and Gaza,” said Diala Shamas, a senior staff attorney at the Center for Constitutional Rights, who described the organizations listed in the campaign as among “the worst actors.”

A legislative effort in New York called the “Not On Our Dime Act” is seeking to challenge the ability of nonprofit organizations in the state to fundraise for illegal settlements, including by making them subject to legal liability or loss of their nonprofit status. Laws against funding activities that violate international human rights law are poorly enforced by the IRS, said Shamas, leaving it to companies and individuals themselves to ensure that their contributions are not going toward organizations potentially engaged in illegal activity.

“Companies often rely on the fact that an organization has 501(c)(3) status. But regardless of whether an organization has nonprofit status, it is illegal to aid and abet war crimes,” Shamas said. “Apple should ensure that it is not sending funds to any of these organizations — especially now when there’s no shortage of evidence or information about the unlawful activities of the settlement movement in the West Bank.”

Apple employees, who organized under the name Apples4Ceasefire, had previously objected to the disciplining and firing of Apple Store employees who “dared to express support of the Palestinian people in the form of kaffiyehs, pins, bracelets, or clothing,” according to a public statement published in April.