#875 2016 · New York City Mayor's Office of Criminal Justice · Criminal justice / courts
New York City cut court no-shows with a redesigned summons and a text, not a threat
the problem
Two in five people handed a criminal court summons never showed up, and every miss became an arrest warrant
background
New York City issues hundreds of thousands of criminal court summonses a year for low-level offences, and in 2015 more than two in five recipients simply never showed up. Each missed date automatically triggered an arrest warrant, converting a minor citation into a standing liability that could surface at any later police encounter. The system's established answer was deterrence: make the consequences of missing court louder.
In late 2014 the city's Mayor's Office of Criminal Justice began to suspect a different culprit: the summons itself, a form that listed the court date at the bottom, under the defendant's physical description and other paperwork. With the behavioural-design nonprofit ideas42 and the University of Chicago Crime Lab, the city rewrote the form and tested both fixes in the field from March 2016 — the new summons quasi-experimentally, the text-message reminders as a randomised trial among about 20,000 recipients.
what everyone would do
The standard lever is deterrence — warn people that missing court means an arrest warrant, or stiffen the penalty. New York's system had spent years making the threat louder, but defendants proved largely insensitive to the severity of consequences, and two in five kept missing their dates anyway.
what they saw
The justice system read no-shows as defiance and kept raising the threat; the city's team read them as forgetfulness. A summons that buries the court date at the bottom is a notice nobody acts on.
the move
The redesigned summons leads with what the recipient has to do: a plain-language title, the date, time and location of the hearing at the top of the ticket, and the consequence of missing court spelled out clearly. Alongside it, the city sent text-message reminders in the days before the hearing — some carrying consequence information, some prompting recipients to make a concrete plan for getting to court. Both then went citywide: law enforcement adopted the new form, and the state court system began texting the most effective reminders to every summons recipient who provided a mobile number.
why it works
Most missed dates were failures of notice and memory, not defiance — the old summons listed the court date at the bottom, under the recipient's height, weight and other bureaucracy. Moving date, time and location to the top and spelling out the consequence in plain words made compliance legible, and text reminders with plan-making prompts carried the date through the intervening days. Because the binding constraint was remembering, not willingness, a few cents of printing and texting captured what years of escalation could not — every appearance restored also spared the city an arrest warrant it would otherwise have had to execute.
the payoff
No-shows fell 13–21% in the field tests, up to a third where form and texts worked together; both went citywide.
where it breaks
It fails where the absence is genuinely deliberate: people who fear what walking into that courthouse will bring — immigration exposure, open warrants, work that cannot be missed — are not reached by a clearer form. It needs a reachable channel; reminders only went to recipients who gave a mobile number. And the gain lives in the notice itself: revert to legalese, bury the date again, or stop the texts, and the behaviour returns.
what came after
New York's rollout made the fix permanent: the Police Department adopted the redesigned summons, and the state court system began sending the most effective reminders to every recipient who gave a mobile number. The study — Fishbane, Ouss and Shah, Science, 2020 (doi:10.1126/science.abb6591) — became a template for court systems elsewhere; a 2025 randomised trial with the Santa Clara County Public Defender's Office (Chohlas-Wood et al., Science Advances, doi:10.1126/sciadv.adx7483) found automated reminders cut bench warrants by about a fifth and reduced incarceration from missed dates too. The paper's follow-up surveys added a caveat: laypeople, unlike experts, tend to believe failures to appear are intentional — the very belief that kept the fix invisible for decades.
references
- [1]Crime Lab finds behavioral nudges improve court attendance in NYCUniversity of Chicago News, 2018news.uchicago.edu
- [2]ideas42 and University of Chicago Crime Lab challenge assumptions about why people miss courtideas42 / University of Chicago Crime Lab (institutional release), 2020eurekalert.org