I found an org that still says its an NPO and certified (sic) by GuideStar.
See https://resolve.org/about-us. The donor info appears to be out of date and misleading.
"RESOLVE is a non-profit, 501(c)(3) organization certified under the National Health Council Standards of Excellence, and Guidestar."
COLLEEN RICHARDSON/ Senior Resource Specialist
Available in person Wednesdays 10:00am-2:00pm
t: 714.288.4007 d: 714.589.2362 (voice messages encouraged on days I'm away)