There is now a growing body of literature which is centred upon the negative outcomes that occur for many families, and by extension, children who experience the imprisonment of a father. Typically families suffer the consequences of living with stigma and financial difficulties, while children are often affected by being provided with limited information about what has happened to their incarcerated parent. These factors can combine to increase the chances of children and family members in this position developing mental and physical health issues and other associated difficulties. Drawing on the findings from the lead author's research on the impact of Indeterminate Sentences of Imprisonment for Public Protection (IPPs) upon families, the authors will argue that for families where fathers are serving IPPs the potentially negative effects of parental incarceration are considerably magnified. With no definite release date there is an absence of hope, which can quickly lead to despair for IPP prisoners and their families. Since IPPs are reserved for those offenders who are deemed to pose the most potential risk to the public in the future there is inevitably an increased level of stigma that attaches to those prisoners who are subject to them, and by extension to their families. The prisoners themselves are often provided with limited information regarding the consequences for them of being subject to an IPP, which in turn means their families also have very little understanding of the gravity of their predicament. The evidence gathered suggested a worrying picture, as the nature of the IPP sentence resulted in a severely detrimental impact upon families and children; it will be argued here even more so than Life and determinate prison sentences.