If the ink is too heavy and the lines on the barcode run together as shown here, the space between the bars is filled in and makes the tag unscannable.
Cut off printing
Notice how the printer has stopped short of printing the entire barcode.
Out of toner
If you are running out of toner on a laser printer or copier, the bars start to lose their integrity. Make sure the lines are crisp and full.
Please do not use linen paper (the kind resumes are printed on) to print your tags. The texture on the paper prevents the ink from creating a readable barcode.
Only the information that is computer generated on the tag is accepted. We cannot alter the discount code from no to yes if the information within the system does not match. This also protects you, the seller, from a shopper just coming in with a pen and changing the discount from a no to a yes without your permission.