If any pilot shall ask or demand for his services greater or different fees than those specified in the rates of pilotage fixed by the commissioners, the commissioners shall, on due proof thereof, require him to pay the commissioners double the amount of the fees fixed by the commissioners.
(Ga. L. 1886, p. 38, § 7; Civil Code 1895, § 1659; Civil Code 1910, § 1905; Code 1933, § 80-305; Ga. L. 1945, p. 279, § 12.)