【要点提示】本案储蓄合同纠纷系一起新型金融纠纷案例。在案件关键证据存款监控录像未保存的情况下,承办人通过存款人账户开户专用凭单签名金额鉴定,结合存款人诉请变更、挂失申请书、出警人员调查笔录,形成证据链,并根据经验法则,比对原告耄耋老人出错和邮政所工作人员违法违规克扣存款额可能性, [Point Tip] The contract case of savings contract is a new case of financial disputes. In the case of key evidence deposit surveillance video is not saved, the contractor through the deposit account account voucher signature amount of identification, combined with the depositor v. Change, loss report, a police investigation transcripts, the formation of evidence chain, and according to the rule of thumb , Compared to the plaintiff 耄 耋 old mistake and the post office staff illegal deduction deposit possibility,