Hey there - fraud is still an ongoing issue for many non-profits, and it's been one of the most well-received features in the product (an understated but important one!). With Tilt.com and our other enterprise tools, we've needed to build automated and manual systems along with third-party integrations to successfully fight fraud at scale.

The by-product of our current efforts is that we're able to include it into each product we release -- shoot me an email if you'd like to intro us to your contacts at those non-profits. james @ tilt is my email.