A soup kitchen has called in the police after finding out that bogus fund-raisers had been seeking donations in its name.
Willing Hearts is the third charity to face this problem in recent months.
In March, the Singapore Red Cross also made a police report after learning that bogus volunteers had sought donations from the public, while the Diabetic Society of Singapore had the same issue last month.
Mr Tony Tay, founder of Willing Hearts, told The Straits Times the charity found out about the scam after people called to check if it was holding a fund-raiser.
They had been approached by individuals on the street or at their homes. Donors even got a receipt with the charity's logo and address.
Mr Tay, 66, said: "This is terrible. We don't ask for donations, and it's not fair for the public to give money to people who are not helping the needy."
One donor, factory worker Leong Yap Wah, 47, said: "Someone came to my house and I gave $10. He said I could check online if I don't believe him."
Willing Hearts, which distributes about 3,000 free meals a day, collects donations only as food items or money through cheque or bank transfer.
The police confirmed a report had been made.