For MSCA Postdoctoral Fellowships, the costs related to secondments, non-academic placements (NAP), and - where applicable - the outgoing phase of Global Fellowships (e.g. researcher travel costs, course or conference attendance expenses, etc.) must be covered by the Research, Training and Networking (RTN) contribution, provided that these activities are eligible, foreseen in the Grant Agreement, and carried out within the allowed duration.
Consequently, there is no flexibility to exclude or withhold reimbursement of such costs solely on the basis of their duration, as long as the activities comply with the maximum lengths set out in the Work Programme and are included in the Grant Agreement (Description of Action). The absence of a specific duration limit for Postdoctoral Fellowships in the MSCA Financial guide should therefore be understood as allowing coverage for the full eligible period, rather than implying that reimbursement is optional.