SWIFT ISO 15022 - Code CSDH Meaning CSD Hold: Central securities depository has set the instruction in a hold/frozen/preadvice mode. Usages Message type Field number Tag MT537 (Statement of Pending Transactions) 19 24B (Reason) MT537 (Statement of Pending Transactions) 65 24B (Reason) MT548 (Settlement Status and Processing Advice) 12 24B (Reason) MT549 (Request for Statement/Status Advice) 17 24B (Reason)