Omnibus Election Code
Section 197. Spoiled ballots. - If a voter should accidentally spoil or deface a ballot in such a way that it cannot lawfully be used, he shall surrender if folded to the chairman who shall note in the corresponding space in the voting record that said ballot is spoiled. The voter shall then be entitled to another ballot which the chairman shall give him after announcing the serial number of the second ballot and recording said serial number in the corresponding spaces in the voting record. If the second ballot is again spoiled or defaced in such a way that it cannot lawfully be used, the same shall be surrendered to the chairman and recorded in the same manner as the first spoiled or defaced ballot. However, no voter shall change his ballot more than twice.
The spoiled ballot shall, without being unfolded and without removing the detachable coupon, be distinctly marked with the word "spoiled" and signed by the board of election inspectors on the endorsement fold thereof and immediately placed in the compartment for spoiled ballots.