The commission shall adopt a seal which shall be affixed to all papers under such regulations as the commission may prescribe. The commission shall likewise prescribe a schedule of fees to be charged for the certification of all records and papers, and sums to be paid witnesses and other costs necessary and incident to hearings before it and order the same paid by the unsuccessful party. All sums collected by the secretary, except witness fees, shall be paid by him into the State Treasury and be credited to the Public Service Commission fund provided for in section six, article three of this chapter. The witness fee shall be paid to the person to whom they are allowed. The sums to be paid into the Public Service Commission fund representing the collection of any month shall be so paid on or before the tenth of the following month.