According to one aspect, an air travel agent who reviews photo IDs of prospective travelers is advised by an expert system that directs the agent to give certain travelers more or less (or different) scrutiny, depending on the type of photo ID they present (e.g., depending on the jurisdiction from which their driver's license was issued). The system relies on a database in which historical incidents of fraud associated with different types of identification documents are logged, thereby serving as a resource by which future frauds might be better identified. Events that may signal increases in fraud beyond historical norms for particular types of ID documents, such as reported thefts of security laminates or other consumables used in their production, can also (or alternatively) be tracked in the database, and considered by the expert system. Such techniques allow security personnel to focus their efforts where they will do the most good. A variety of other technologies for mitigating fraud risks are also detailed.