letter of conduct

Noun

 * 1)  a safe-conduct, a document guaranteeing safe passage through hostile territory
 * 2) a document affirming a person’s lack of a criminal record given as part of a background check
 * 1) a document affirming a person’s lack of a criminal record given as part of a background check
 * 1) a document affirming a person’s lack of a criminal record given as part of a background check