An article by Banks, Newman, & Saleem (2015) investigated the use of mindfulness with clients who have C-PTSD. Clinical trials have shown that some patients do not respond as well to CBT approaches. Emotions such as guilt and shame contribute to residual PTSD and C-PTSD symptoms. 

Mindfulness is a technique used to reduce the avoidance of these emotions and thoughts in a non-judgmental manner by increasing acceptance while decreasing negative thoughts, self-blame, and emotions such as shame or guilt.

Mindfulness-Based Stress Reduction

MSBR is one approach that has been commonly cited in research.  MSBR is a group intervention delivered over right weekly sessions. MSBR incorporates mindfulness meditation, experiential experiences, Hatha yoga, discussion on stress and coping, and homework tasks for daily mindfulness practices.

Mindfulness-Based Cognitive Therapy

MBCT  is similar to MSBR, but includes a cognitive component.  It was first developed to treat depression, but has shown efficacy in C-PTSD.  MBCT is a program of eight weekly sessions, plus one all-day session. The focus of MBCT is on being more aware of thoughts and feelings with an emphasis "on changing the relationship individuals have with their thoughts rather than changing or challenging the content of the thoughts" Banks, Newman, & Saleem, 2015, p. 937).

Clinician Consideration

Some studies on Mindful meditation have shown an increase of depersonalisation and derealization in a small population, and therefore should only be practiced under supervision or by trained practitioners so any adverse affects can be monitored.