On 8 August it was reported that seven Iranian citizens – Fariba Kamalabadi, Jamaloddin Khanjani, Afif Naeimi, Saeid Rezaie, Behrouz Tavakkoli, Vahid Tizfahm and Mahvash Sabet – had been sentenced to 20 years in prison. These sentences have since been reduced to 10 years. The seven previously constituted the informal leadership of the Bahá’í faith in Iran and their case has attracted international attention. We write to express our serious concerns about questions of due process that have arisen since their arrest in 2008 and throughout their detention, trial and sentencing.