• Part Markings - Improperly marked components are a key indicator of counterfeiting. The markings may be poor reproductions of the original designs, double markings as the counterfeiters stamp over the original etchings, or incorrect sizing and layout (i.e. 3 lines of text instead of 2).
• Incorrect Device Lead Type - if a component should have gold leads, but does not, the part should be considered suspect and investigated before use.
• Lead Conditions - damaged, tinned, or corroded leads are common indicators of counterfeit components.
• Component Condition - reclaimed parts sold as new have suspect reliability.  Some indicators are improper or missing documentation, minor damage, presence of solder on leads, etc.

• The most common source of counterfeit components are non-franchised distributors.  While they are not the ONLY source, they are responsible for a majority of counterfeit components.

Methods for Prevention -

• Trusted Sources - All at-risk components should be purchased only from the manufacturer or franchised distributor.  If this is not possible, then incoming components should be thoroughly inspected and tested to ensure their validity.
• Incoming Inspection - Inspecting incoming inventory for known and possible signs of counterfeiting should reduce the risk and increase reliability.
• Certificates of Compliance - requiring a certificate of compliance and verifying the certificate will not completely prevent counterfeit parts (due to the possibility of counterfeit certificates), but it can significantly reduce the probability and provide traceability.
• Quality Systems Audit - periodically auditing the suppliers quality processes can ensure they are doing everything possible to prevent the shipment of counterfeit components.