DISCUSSION
Our research demonstrates that voluntary APN can be implemented successfully and ethically within the organizational structure of a prison setting. The Impart model's positive effects in increasing partner notification remained significant in and after adjusting for partner sex and type and even when assuming best‐case scenarios for missing verification data in the control group. The use of clinically trained notifier teams equipped to offer immediate point‐of‐contact HIV testing was successful to increase HIV testing and find new cases.In general, the motivation to inform a partner of HIV exposure can be attributed to one or more factors, including self‐perception of ethical responsibility, concerns about the partner's health or to secure social support [No one approach to partner notification works best, and a combination of different approaches is needed [Impart point‐of‐contact HIV testing also yielded a higher success rate than depending on an index person alone to encourage their partners to be tested. Of the 24 partners contacted in the Impart arm, 15 completed immediate point‐of‐contact HIV testing, of whom five were newly diagnosed and referred for treatment. Given that each partner contacted through APN was suspected or known to have been exposed to HIV, even partners who declined testing or who tested negative stood to benefit from notification counselling in HIV prevention.