Said petitions, before being returned and filed, shall be signed by qualified electors equal to twenty-five (25) percent of the number of votes cast, at the last preceding general election, for all of the candidates for the office held by such officer sought to be removed, and to each signature shall be attached his or her place of residence, giving street and ward number and date of signature. Such signatures need not all be on one (1) paper.
One (1) of the signers of each sheet of such petition, or the person circulating such sheet, must make and subscribe an oath on said sheet, that the signatures thereon are genuine.
All such papers for the recall of any one (1) officer shall be fastened together, and filed as one (1) instrument, with the endorsement thereon of the names and addresses of three (3) persons designated as filing the same.