Although another person has performed a certain parochial function, that person is to put the offerings received from the Christian faithful on that occasion in the parochial account, unless in the case of voluntary openings the contrary intention of the donor is certain. The diocesan bishop, after having heard the presbyteral council, is competent to establish prescripts which provide for the allocation of these openings and the remuneration of clerics fulfilling the same function.
Source: Code of Canon Law (Vatican.va)