duly certified copy

证实无误，中文例... ... duly certified copy 经正式认证无误的副本 The accounts were certified correct. 帐目经核查证明无误。 ...

copy-英汉词典-英中字典-速译通... ... duly certified copy {n.}正式核准副本 dummy copy 代用复本,具有内容摘要的样本 ...