BTW - Charity Navigator is one place to check an organization. Organic Consumers Association has a 2-star rating on Charity Navigator. Another similar organization, for example, Center for Science in the Public Interest, has a 4-star.
Keep getting calls no matter what time of day. They don't leave a message. I wish it would stop! I'm also reg. with Do Not Call List. So how do they get through?
The DNC isn't a call blocker and can't protect you from criminals, frauds, illegal telemarketers or other nefarious criminals. Do consider maybe getting a call blocking device or phone.. You can google them and many are around $60.00 or so.