If I’m not mistaken, legislation in New York that would automatically enroll people as organ donors with the option of opting-out later is an example of “libertarian paternalist” choice architecture. One of the authors of Nudge suggests an alternative to so-called “presumed consent” laws here:
Fortunately, there is another possibility, called “mandated choice,” under which people must indicate their preference. In Illinois, where I live, this system has been in use since 2006 and doesn’t seem to have ruffled many feathers.
Here is how it works: When you go to renew your driver’s license and update your photograph, you are required to answer this question: “Do you wish to be an organ donor?” The state now has a 60 percent donor signup rate, according to Donate Life Illinois, a coalition of agencies. That is much higher than the national rate of 38 percent reported by Donate Life America
More info on “presumed consent” organ donation laws here.