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Chapter 7Bar Codes
Check Digit
The modulo-10 check digit is automatically calculated and inser ted in the bar
code symbol. The check digit verifies accurate scanning. The number system
character is included in the check digit algorithm.
FIM
The FIM (Facing Identification Mark) bar code structure is shown in Figure 13
and described on the following pages. The left boundary must begin 3 inches
from the right edge of the mail piece. The right-most bar must be 2 inches ±1/
8-inch from the right edge of the mail piece. Bars are 5/8-inch ±1/8-inch tall;
the top of the bars must be no lower than 1/8-inch from the top edge of the
mail piece (and may touch the top edge of the mail piece). The bar code
baseline must be within 1/8-inch from the bottom edge of the clear zone.
Figure 13. FIM Structure
NOTE: Additional information regarding FIM bar code requirements can be
obtained from the U.S. Postal Service's Publication 25:

AGuideto

Business Mail Preparation.

Quiet Zone
The bar code structure requires a completely blank, 1-1/4-inch wide, 5/8-inc h
tall quiet zone, reserved for only the appropriate FIM pattern. You must
provide sufficient space for this zone.
ReturnAddress Area
5/8"
1-1/4"
(OptionalLine)
(TopLine)
(OptionalLine)
(LineAbove Last)
(LastLine)
NON-ADDRESSDATA
NAMEOF RECIPIENT
INFORMATION/ATTENTIONLINE
DELIVERYADDRESS
POSTOFF ICE STATE ZIP
xxxx,yyyy
1-3/4"
Quiet
3"
1/8"
2"-1-7/8"
Zone
NOTE: Illustrationis not to
scale.
NOTE: Illustrationis not to scale.