The 3M SelfCheck system sends this command when requesting that the ACS block a patron’s card. For example, if a patron is suspected of tampering with the 3M SelfCheck system or when a patron forgets to take their card, this command may be sent. The ACS must respond with a Patron Status
Response, and should invalidate the patron’s card. Refer to Scenario 9 and 15.
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This message requests that the patron card be blocked by the ACS. This is, for example, sent when the patron is detected tampering with the SC or when a patron forgets to take their card. The ACS should invalidate the patron’s card and respond with a Patron Status Response message. The ACS could also notify the library staff that the card has been blocked.