Partner notification (PN) is considered integral to the management of sexually transmitted infections (STI). Patient-referral is a common PN strategy and relies on index cases notifying and encouraging their partners to access treatment; however, it has shown limited efficacy. We conducted a mixed methods study to understand young people's experiences of PN, particularly the risks and challenges encountered during patient-referral. All young people (16-24 years) attending a community-based sexual and reproductive health service in Zimbabwe who were diagnosed with an STI were counselled and offered PN slips, which enabled their partners to access free treatment at the service. PN slip uptake and partner treatment were recorded. Among 1807 young people (85.0% female) offered PN slips, 745 (41.2%) took up ≥1 PN slip and 103 partners (5.7%) returned for treatment. Most participants described feeling ill-equipped to counsel and persuade their partners to seek treatment. Between June and August 2021, youth researchers conducted in-depth interviews with 41 purposively selected young people diagnosed with an STI to explore their experiences of PN. PN posed considerable social risks, threatening their emotional and physical safety. Except for a minority in long-term, publicly acknowledged relationships, participants did not expect PN would achieve successful outcomes. Public health discourse, which constructs PN as "the right thing to do", influenced participants to adopt narratives that concealed the difficulties of PN and their unmet needs. Urgent interrogation is needed of whether PN is a suitable or constructive strategy to continue pursuing with young people. To improve the outcomes of preventing reinfection and onward transmission of STIs, we must consider developing alternative strategies that better align with young people's lived experiences.