When scanning one-dimensional bar codes, position them horizontally to match the linear scaling of the bars.
If patterns of text and specks are detected erroneously as bar codes, then you can ignore those areas or rescan the page.
If the bar code is skewed on the page, then position the page so that the bar code is aligned horizontally or vertically with the scanner.
Increase the bar code font size to a more readable size.
Know the type, resolution, orientation, placement, and number of bar codes on a document.
Establish a clear area around the bar code to prevent patterns of text and specks from appearing as bar codes.
Make sure that there is enough contrast between the bar code and the color of the material that you are printing on.
Make sure that asterisks appear before and after the bar code characters. Asterisks are used as start and stop characters for most linear bar codes.