The costs of any proceedings, authorized or directed to be brought against any fiduciary to enforce or compel his compliance with the requirements of the law, shall include a reasonable fee to the fiduciary commissioner at whose instance the same are had, and shall be charged and paid as the court may direct. In every case where the fiduciary is in default, without reasonable excuse therefor, the costs shall be adjudged against and paid by the fiduciary personally. In no case shall the costs be adjudged against the fiduciary commissioner unless he instituted the proceedings in bad faith.