GuideStar is a database that houses information about nonprofits for the public to peruse when evaluating the mission and effectiveness of nonprofits. Guidestar pulls its information from Forms 990 filed by nonprofit organizations.
There are three things you may need to do on Guidestar to ensure that Network For Good can successfully process and deliver your donations. First, you should claim your profile. Second, you should ensure that you're opted-in to receive donations and that your address is up-to-date so that Network For Good sends checks to the right place.
Or, check out GuideStar's home page for their 'how-to' documents.
Related concern: My check was sent to the wrong address.