Abstract: Procedure for Publicizing Public Notice for Assertion of Claims (PNAC) can be served as certain proof for a copy of negotiable instruments, through which invalidating judgment can be obtained; thereby risks will be increased as the third party manipulates litigation fraud to harm the holder's interest. To identify litigation fraud by PNAC, the law components, the means and its causes should be made clear. Litigation fraud by PNAC includes such causes as the unclear applicant, the variance between the effective date of a invalidating judgment and the maturity of a negotiable instrument, the imperfect relief procure against a wrong invalidating judgment, the systematic defects of PNAC checking; moreover it covers some profound practical motives of economics of law and sociology of law. The relief procure, civil and criminal responsibility of legislative regularization and countermeasures must be enhanced to govern the use of PNAC as litigation fraud.