Electoral laws typically allow for the integrity and secrecy of the submitted ballot to be maintained, and stipulate a series of checks to protect against voter fraud. Voting at a distant polling place is subject to the same controls as voting locally, though distant staff are less likely to recognize an impersonator than local staff. Voting by mail is sometimes controlled by using security printing, such as special paper, or by requiring signatures of voters and sometimes witnesses, though signature comparisons have 10-14% error rates. Thousands of ballots fail these checks and are rejected. Evidence of fraud is uncommon. While postal voting has a greater risk of fraud than in-person voting, on an absolute level cases of known fraud are extremely rare.