Product Code Database
An optional information line is a line above the postal address on mail in the United States. The lines are usually seen on bulk mail to indicate the sorting and separation that allows the mail to have a lower postal rate.
Examples of bulk mail that have information lines include First-Class Mail, periodicals, USPS Marketing Mail, and bound printed matter.
Possible optional information lines include the optional endorsement line (OEL), an address change service (ACS) participant code, carrier route information, and a mailer's keyline.
| * * * * * * * * * * * * * * * * * * CAR-RT LOT**C-001 |
| * * * * * * * * * * * * * * * * * * * * * ECRLOT**C-001 |
| * * * * * * * * * * * * * * * * * * * * * * * * 3-DIGIT 771 |
| * * * * * * * * * * * * * * * * CAR-RT SORT**C-001 |
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