GAPP Joint Action (facilitatinG the Authorisation of Preparation Process for blood and tissues and cells) is a 36 months JA aiming at facilitating the development of a common and optimal approach to assess and authorise preparation processes in blood and tissues establishments (BEs and TEs). Particular attention will be devoted to innovative processes that might come up taking advantage of the work developed in previous EU funded projects/actions. This Joint Action will clearly contribute to the implementation of Union legislation in the fields of human tissues and cells, blood, providing tools and training to increase harmonisation of those MS activities that regulate the areas of blood transfusion, transplantation of tissues and cells and assisted reproduction, in strong abidance with art 4.5 of Annex I of Regulation 282/2014. These are fields of healthcare that involve a considerable amount of movement of donated substances of human origin between MS and also movement of citizens between MS for treatment, particularly in the field of assisted reproduction. The aim of the action is to prepare a “Good Practice Guidelines to authorisation and preparation process in blood, tissues and cells” and its three technical annexes respectively on i) authorisation changes in donation, procurement and collection, processing, preservation, storage and distribution (divided in three part blood, tissues and cells, and reproductive tissues and cells); ii) assessing the quality and safety of donor testing, microbial inactivation and sterilisation steps as part of PPA; iii) assessing clinical data as part of PPA. In addition to this it will be built a model and a tool to facilitate sharing of information among European Union Competent Authorities and a number of CA inspectors will be trained specifically to assess and authorise preparation processes of tissues, cells, reproductive cells and blood products.