The issue may be caused by the following:

• Documents skewed during a scan.

• Documents of different widths and lengths in the same batch were scanned.

• A plastic card was loaded vertically.

• When documents may have been skewed during a scan

  When you load the documents, adjust the side guides to the width of the documents.

• When documents of different widths and lengths in the same batch were scanned

  Align the top of the documents, and load them in the ADF paper chute (cover) as the leading edge. Make sure that all documents are set to the center of the pick roller's width.

  Also, adjust the side guides to the widest document in the batch. The rest of the documents should be set straight to avoid skewing.

• When a plastic card was loaded vertically

  When you scan a plastic card, make sure to load it in the ScanSnap horizontally.

  If the card is embossed, load it face down and horizontally.