MagTek MINI MICR RS232 - Manual (Page 47)

MINI MICR RS232 with 3-Track MSR
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3-Amount Field
The Amount field is a 10-digit field bracketed by Amount symbols. The field is always zero-
filled to the left.
4-Auxiliary On-Us Field
The Auxiliary On-Us field is variable, 4-10 digits, bracketed by two On-Us symbols. This field
is not present on personal checks. On business checks, this field contains the check serial
number.