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The Coding Accuracy Support System (CASS) improves the accuracy
of carrier route, five-digit ZIP, ZIP+4, and delivery point
codes that appear on mail pieces. The encoding process performs
the following procedures:
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Edit and parse the address file to be matched. Parsing
requires that the individual elements that make up an
address are isolated, edited, and standardized. Parsing
includes:
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separating the individual words of the address (ZIP
Code, street name, suffix, directionals, etc.) based
on spaces, commas, periods, colons, other delimiters,
or field position
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distinguishing elements such as apartment, suite,
room, etc. and placing them in a secondary address
field placing company names, building names, or other
secondary information in a secondary name field
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standardizing the state field as shown in the Postal
Addressing Standard, Publication 28 or the AIS Product
Technical Guide
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Convert numeric street primary names from alphabetic
spelling to numeric equivalent.
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Standardize the street suffix field to conform to USPS
suffixes.
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Standardize directionals to conform to USPS directionals.
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Correct spelling of city names.
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