No claims shall be paid by the district treasurer until the same shall have been allowed by the board, and only upon warrants signed by the president and countersigned by the secretary, which warrants shall state the date authorized by the board and for what purpose; provided, no warrant shall be issued or obligation incurred unless the district treasurer has sufficient funds on hand to pay such warrant when it is presented for payment. All claims against the district shall be verified and the secretary of the district is hereby authorized and empowered to administer oath to the parties verifying said claims, the same as the county clerk or a notary public might do. The district treasurer shall keep a register in which he shall enter each warrant as issued and as presented for payment showing the date and amount of such warrant, to whom payable, the date of the presentation for payment, the date of payment and all warrants shall be paid in the order of their presentation for payment to the district treasurer. All warrants shall be drawn payable to the claimant or bearer, the same as county warrants.