Unison:Result Codes

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Unison by Melissa Result Codes

Result Code Use

Melissa's products use a result code system to indicate data quality; the status and any errors. These result codes are four-character codes (two letters followed by two numbers), delimited by commas. Result code definitions are shared among Melissa products.


An example returned result code string:


Instead of looking at multiple properties and methods to determine status, you can look at the output of the results parameter.

From this output you can determine that the address was:

Code Short Description Long Description
AS02 Street Only Match The street address was verified but the suite/apartment number is missing or invalid.
AE09 Sub Premise Number Missing The thoroughfare (street address) was found but the sub premise (suite) was missing.

Understanding the Code

To fully understand result codes, you need to know them. Knowing what codes are possible and what they indicate will be key in building an effective application. It is useful to know all the codes, but this does not necessarily mean you will use them all. Just because you have a toolbox, doesn't mean you will also try to use a screwdriver along with a hammer on a nail.