CASS Error Code Summary
Error Code	Cass Description	Summary	Sample
E101	Last line is bad or missing	There was no City, State and Zip input to standardize.	David Debtor, 123 Main Street Apt 4,
E212	No city and bad ZIP	The record doesn't include a recognizable city name, so look-up in the City directory is impossible. The record does include a ZIP Code, but no match for it can be found in the ZCF directory.	David Debtor, 123 Main Street Apt 4, PA 50000
E213	Bad city and no ZIP	The record includes something that might be a city name, but no match for it can be found in the City directory. The record includes a valid state. The record doesn't include a ZIP Code, so no look-up in the ZCF directory is possible.	David Debtor, 123 Main Street Apt 4, NotPATown PA
E214	Bad city and bad ZIP	The record includes something that might be a city name, and something that might be a ZIP Code. However, both of them are invalid, because no match for either of them can be found in the City and ZCF directories.	David Debtor, 123 Main Street Apt 4, NotPATown PA 50000
E216	Bad ZIP, can't determine which city match to select	The record may or may not include a ZIP Code. If it contains a ZIP Code, no match for it can be found in the ZCF directory. When looking up the record's city and state in the City directory, ACE finds two or more matching cities in the state. Because the ZIP Code is bad or missing, ACE cannot determine which city or ZIP Code to assign.	David Debtor, 123 Main Street Apt 4, UnsureTown PA 50000
E302	No primary address line parsed	There was no street address line input for standardization	David Debtor, Apt 4, PATown PA 19403
E412	Street name not found in directory	No match for the record's street name can be found in the ZIP4 directory. Perhaps the street name is misspelled or badly abbreviated. If the address line contains garbage that might be interpreted as a part of the street name, this also can result in E412.	David Debtor, 123 Unsure Street Apt 4, PATown PA 19403
E413	Possible street name matches too close to choose	The ZIP4 directory contains two or more street names that resemble the record's street name. However, the resemblance between potential matches is so close that ACE cannot choose one over another. For example, if the street is "Kings" but the directory lists "King" and "Kins," both of the possible matches are equally similar to the street name.	David Debtor, 123 56th Street Apt 4, PATown PA 19403
E420	Primary range is missing	The street address line does not have a specific house number	David Debtor, Main Street Apt 4, PATown PA 19403
E421	Primary range is invalid for street/route/building	The house number does not fit the range of house numbers for that street	David Debtor, 10000000 Main Street Apt 4, PATown PA 19403
E422	Predirectional needed, input is wrong or missing	The ZIP4 directory indicates that a predirectional is required to choose between possible matches. However, either the record doesn't include a predirectional, or its predirectional is invalid (not listed for that street). For example, when the record shows "Elm" or "North Elm," but the directory lists only "East Elm" and "West Elm," then ACE assigns E422.	David Debtor, 123 Main Street Apt 4 (should be 123 N Main Street Apt 4), PATown PA 19403
E423	Suffix needed, input is wrong or missing	The ZIP4 directory indicates that a suffix is needed to choose between possible matches. However, either the record doesn't include a suffix, or its suffix is invalid (not listed for that street). For example, when the input is "Elm" or "Elm Road," but the directory lists only "Elm Street" and "Elm Avenue," ACE assigns E423.	David Debtor, 123 N Main Apt 4, PATown PA 19403
E425	Suffix & directional needed, input wrong or missing	The ZIP4 directory indicates that both a suffix and a directional are needed to choose between possible matches. However, either the record doesn't include a suffix and directional, or its suffix and directional are invalid (not among those listed for the street).	David Debtor, 123 N Main Street Apt 4 (could be 123 E Main Street N Apt 4 or 123 E Main Ave N Apt 4 ), PATown PA 19403
E427	Postdirectional needed, input is wrong or missing	The ZIP4 directory indicates that a postdirectional is required to choose between possible matches. However, either the record doesn't include a postdirectional, or its postdirectional is invalid (not among those listed for the street). For example, ACE assigns E427 when the record has "Elm" or "Elm North," but the directory lists only "Elm East" and "Elm West."	David Debtor, 123 N Main Street Apt 4 (could be 123 W Main Street Apt 4 or 123 E Main Street Apt 4 ), PATown PA 19403
E428	Bad ZIP, can't select an address match	The record's ZIP Code is missing or invalid. The City directory shows that the record's city/state covers two or more ZIP Codes. In the ZIP4 directory, ACE can find matches for the address line in at least two of those ZIP Codes. ACE can't use the bad input ZIP to break the tie on the address line, or use the address line to choose a good ZIP.	David Debtor, 123 Main Street Apt 4, PATown PA 99999
E429	Bad city, can't select an address match	The record's city name is missing or invalid. The ZCF directory shows that the record's ZIP Code applies to two or more city names. In the ZIP4 directory, ACE can find matches for the address line in at least two of those cities. ACE can't use the record's city to break the tie on the address line, nor use the address line to choose a city name.	David Debtor, 123 Main Street Apt 4, WrongTown PA 19403
E430	Possible addr. line matches too close to choose one	The ZIP4 directory contains two or more address lines that resemble the input address line. However, the resemblance between potential matches is so close that ACE cannot choose one over another.	David Debtor, 123 Main Street Apt 4, 456 Anywhere Rd, NewTown PA 19403
E431	Urbanization needed, input is wrong or missing	The ZIP4 directory contains two or more address lines that resemble the input address line. To choose, Puerto Rican urbanization is needed. However, either the record's address doesn't include urbanization, or its urbanization is wrong	David Debtor, 123 Main Street Apt 4, PRTown PR 00001 (needs building location)
E439	Exact match in EWS directory	The EWS (early warning system) directory is a list of new addresses that might not necessarily be in the current delivery point database, but are valid addresses.  If an address matches an address in the EWS directory, it is a valid address but would not be able to receive a full postnet barcode as it is not in the Zip4 system yet.	Any address could be an example
E500	Other Error	E500 is a catch-all error code assigned when no more specific code can be assigned. Usually it indicates that no potential match meets the minimum confidence level, or that there is an unresolved tie between two or more potential matches.
E501	Foreign	The address is not within the domestic United States, territories, or possessions.
E502	Input record entirely blank	The address information provided is completely empty
E503	ZIP not in area covered by partial ZIP+4 Directory	All information is valid, but the city is not available in the Zip4 grid.  This would not cause mail to go undelivered.
E504	Overlapping ranges in ZIP+4 directory	There is an overlap of Zip4 areas at this address.  This would not cause mail to go undelivered.
E505	Matched to undeliverable default record	The record is an address that does not exist in the USPS directories. This address is not suitable for delivery.  A record will be classified as E505 by ACE if it is a default record. It’s created as a placeholder in the directories and doesn’t exist in the USPS data. It is either missing the necessary secondary information (such as apartment number) or contains invalid secondary information.	David Debtor, 123 Main Street, PATown PA 19403
E600	Marked by USPS as unsuitable for delivery of mail	According to the USPS, no delivery to this address is possible. The address is listed in the ZIP4 directory, but the record is tagged as undeliverable by the USPS. It might be a cemetery, parking ramp, or condemned building.
E601	Address failed DPV	The house number of the address falls within an acceptable range for cass, but DPV has determined that it is not an actual deliverable address.	Main Street has houses from 100-199.   David Debtor, 123 Main Street, PATown PA 19403.  DPV determines there is no 123 on Main Street, although there is a 122 and 124.