FinancialService.bulkCreditOperation() applies expire/extend_expiration/transfer to existing credits (1–100 ids). expire forfeits the remaining amount via a credit_expiration transaction and reduces the client balance; extend_expiration sets a new expiration_date; transfer moves the remaining amount to parameters.target_client_id. Returns per-id results { total_requested, successful, failed, results[] }.
Content type: application/json · schema FinancialBulkCreditOperationBody
expireextendtransferSuccess response 200 · schema FinancialInvoiceApiSuccess