Background:Many developed countries have introduced strict measures designed to deter people seeking asylum. Measures such as held detention, insecure visas, restrictions work and services all impact the mental health of asylum seekers. In 2014 Australia introduced a ‘fast track assessment’ (FTA) system of processing refugee claims for asylum seekers who arrived by boat, those found to be refugees were only eligible for temporary residence. Legal professionals play a pivotal role in protecting the rights of asylum seekers and gain unique insight into the impact of the legal system has on clients mental health.Aim:To investigate how legal professionals in Australia perceived the impact of the FTA process on their clients.Methods:Mixed methods comprising of two phases – (i) an online survey and (ii) follow-up focus groups and interviews with legal professionals involved in assisting asylum seekers in the FTA process. An inductive thematic analysis was used to analyse the data.Results:Survey results were obtained from 38 legal professionals. Follow up in depth qualitative focus groups and interviews were conducted with 16 survey participants. The data demonstrate that legal professionals encounter clients in complex seemingly insurmountable mental health crises including deepening mental distress and deterioration, feelings of hopelessness, defeat and entrapment. Interviewees shared compelling examples of what they believed constituted a direct connection between asylum seekers experiencing uncertainty and deteriorating mental health over time with fluctuations in hopelessness, anger, withdrawal and suicidality. These negative impacts were often compounded by separation from family.Conclusions:The legal framework for determining whether an asylum seeker is a refugee can have a detrimental impact on the mental health of asylum seekers. The mental distress of asylum seekers and refugees is exacerbated by uncertainty linked to both delays in processing accompanied by sustained and ongoing uncertainty of legal status.