An individual has an obligation to know something about the organizations to which he donates money and may not contribute to an unqualified charity adminstrator.

Administrators must be trustworthy and wise and strict with the poor that they not be frauds. And it is forbidden to give tzedakah to any administrator who is not trustworthy. Ramah, Yoreh Deah 257.1

And a person should not contribute to a tzedakah fund unless he knows that its management is reliable and knows how to conduct the fund properly. Shulchan Aruch, Yoreh Deah 249.7

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