DoNotPay, the "world's first robot lawyer" app, plans to use GPT-4 for "one-click lawsuits" against robocallers. However, GPT-4 has a dissenting opinion, warning that it cannot provide legal advice. DoNotPay founder Joshua Browder previously planned to use DoNotPay to defend a client in a live situation but had to cancel the endeavor after facing legal warnings. A lawsuit was later filed against DoNotPay for violations of California's unfair competition law. Browder plans to use GPT-4's multimodal feature to identify errors in medical bills and draft a legal defense.