<![CDATA[Property-deposit services in correctional institutions must reconcile security, administrative accuracy, and public confidence. A field assessment at Class III Sarolangun Rawas Correctional Institution identified an information gap: once goods were handed to officers, families had no independently accessible evidence that the items had reached the intended incarcerated person. This community-service program designed BUPENBAR-KEL, a scannable code linked to photographic evidence of handover, and reports it as a service design and prototype rather than as a proven outcome. Implementation followed a descriptive action-oriented approach across nine stages using existing resources: one smartphone, internet access, one digital storage account, printed guidance, and service officers, with a planned budget of IDR 142,000. The article contributes three elements: an explicit causal argument linking accessible photographic evidence to reduced information asymmetry and trust formation through a principal-agent lens; a minimum technical specification that allows replication; and an operational measurement design. Because no pre-post quantitative data were collected, effectiveness is not claimed. Initial observation suggests the design could potentially make service completion verifiable without altering security inspection procedures.]]>
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