Collection Continuing NHS Healthcare (CHC): retrospective claims Guidance for health boards and trusts on proof of payment for reimbursement of retrospective CHC claims. Part of: NHS management (Sub-topic) First published: 27 July 2015 Last updated: 1 February 2016 Publications Retrospective claims (WHC/2016/003) 1 February 2016 Guidance Retrospective claims (WHC/2015/039) 27 July 2015 Guidance