This most common variant involves a frank dissection of the abusive relationship. The parties meet to analyze what went wrong, to allocate blame and guilt, to derive lessons, and to part ways cathartically cleansed. In such an exchange, a compassionate offender (quite the oxymoron, admittedly) offers his prey the chance to rid herself of cumulating resentment.~ Sam Vaknin 

Ideally he would let her know that it wasn't her fault, that she could have done nothing to deserve it, that nothing she did would have made him better. Once the target of abuse knows this and hears it from the horses mouth, hopefully she could get on with her life. The burden of self-incrimination is gone. 

Retributive Closure

When the abuse has been "gratuitous" (sadistic), repeated, and protracted, conceptual closure is not enough. Retribution is called for, an element of vengeance, of restorative justice and a restored balance. Recuperation hinges on punishing the delinquent and merciless party. The penal intervention of the Law is often therapeutic to the abused.~ Sam Vaknin 

This falls under one of the Top 10 Reason the EXpose your EX. Click over there and review the good reasons for telling on your abuser and ways in which you can expose him. Exposing him or her as an abuser is a good way to work on retributive closure. We never advocate anything illegal or immoral but retribution can be sweet. According to some recent research  reported in Scientific American, Mind (Jan 2005) revenge stimulates the same types of reward centers in the brain that desserts, desire, and drugs do. "Ernst Fehr, from the University of Zurich in Switzerland, and his colleagues have shown that the dorsal striatum--the part of the brain that processes rewards--lights up when we punish those who have betrayed our trust."