I've posted this information before, however I am reposting it because there are new people who join us and they might find it of use.
There are a lot of telemarketers here in the US. While you can add your name to the No Call Registry https://www.donotcall.gov/default.aspx , charities are not obligated to follow the no-call rule so you will still get them calling. My husband and I have no problems supporting charities but we want to make sure our dollars are used efficiently and effectively by the charity involved. I just got off of the phone with one charity who say they are devoted to finding missing children, however, through this handy-dandy website: http://www.charitynavigator.org/index.cfm?bay=topten I was able to plug their name into the search box and discover that of the money they raise nearly 90% goes to fundraising (86%) and administrative expenses and about 10% only is spent on the actual projects for which they raise funds. I am able to make an informed evaluation of the charity and I have no hesitation in telling them the reason that we will not support them, quoting the figures from this website. So, I have bookmarked this site and it is really easy to access it when a telemarketer calls and I can check out whether they are a worthwhile charity of not. It might be something you would like to do - because there are a lot of telemarketing charities out there!