Format check

Format checks are performed on the date, check digit, time, currency code, and country code fields.

For date fields, the format check verifies that the date provided is valid. The format check ensures the range of the month, day, and year are valid and also that the date is valid. For example, 2/29/2008 is valid since 2008 was a leap year, but 2/29/2007 fails because 2007 was not a leap year.

A format check for a check digit is computed from the characters given and compared to the given check digit to verify it is correct.

For a time field, format check verifies the hour and minute are within the appropriate ranges. The hour range is 0 - 23 and the minute range is 0 - 59.

The following table shows the formats that are supported.

Table 1. Supported formats
Format	Description
YYYYMMDD	Date, where: YYYY Is the year MM Is the month DD Is the day
YYMM	Date, where: YY Is the year MM Is the month
MMDD	Date, where: MM Is the month DD Is the day
MMYY	Date, where: MM Is the month YY Is the year
hhmm	Time, where: hh Is the hour (0 - 23) mm Is the minutes (0 - 59)
hhmmss	Time, where: hh Is the hour (0 - 23) mm Is the minutes (0 - 59) ss Is the seconds (0 - 59)
TTTTAAAAC	Routing number with check digit, where: TTTT Is a Federal Reserve prefix number AAAA Is an ABA institution identifying number C Is the check digit for the first eight digits
bTTTTAAAAC	Routing number with check digit, where: b Is a blank TTTT Is a Federal Reserve prefix number AAAA Is an ABA institution identifying number C Is the check digit for the first eight digits
C	Check digit is a single character field that checks the preceding eight characters.
TTTTAAAA	Routing number without check digit, where: TTTTAAAA Is all digits
CP00RSNNN	Canadian ICL format, where: C Is the currency indicator P Is the item type 00 Is always zeros R Is the region code S Is the processing site NNN Is the financial institution number
CanadianRT	Validation uses the Canadian routing transit number format.
CountryCode	All two letter country codes as defined in ISO 3166.
CurrencyCode	All three letter and three digit currency codes as defined in ISO 4217.