The auditor shall have prepared, in separate series, warrant blanks for each year. They must be numbered consecutively, and must show the year against the revenue of which they are to be issued. He shall begin the use of a new series of warrants on the first day in October of each year. All warrants issued by the auditor shall be upon the warrant blanks of the series for the year chargeable with the amount for which such warrant is issued, and the number, date and amount of each, and the name of the person to whom payable, and the purpose for which drawn must be stated thereon. All warrants must, at the time they are issued, be registered by the auditor.