Alyssa Milano, a UNICEF Goodwill Ambassador, donated $50,000 to the charity’s Haiti earthquake relief efforts of Friday, and the former Charmed star is making a “Tweet Challenge” imploring corporations to match her donation.

“I challenge any corporation to match my $50,000 donation to the U.S. Fund for UNICEF. 100% of every dollar will go directly to supplies that include tarpaulins, water-purification tablets, oral rehydration salts, family water kits, medical supplies, medical kits, food, shelter, and protection,” the actress wrote in a statement on The Huffington Post Friday.