Avision AV620C2+ (DF-1015S/DF-1004S) - Manual (Page 60)

4.6 The Multi-Feed Detection Tab
Multi-Feed Detection
Multi-Feed Detection allows you to detect overlapped document
that go through the auto document feeder. Multi-Feed usually
occurs due to stapled documents, adhesives on documents, or
electro-statically charged document. Note： The availability of
the function varies based on type of scanner.
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