PF, COFUND: Is it compulsory to shift to part-time implementation of Postdoctoral Fellowships and COFUND fellowships for postdoctoral researchers in order to engage in teaching if it is a one-time, short-term activity?

The MSCA Financial Guide states that “... Teaching is also permitted (if it does not jeopardise the implementation of the action) as long as it is described in Annex 1 of the GA”

If teaching activities remain minor, do not jeopardise the research project, and are present in Annex 1 of the Grant Agreement - they are authorised, and part-time arrangements are not necessary.