Extraneous data that is within an address line is returned in AdditionalInputData. For example, in the following addresses "John Smith" would be returned in AdditionalInputData.
123 Main St John Smith
05674
123 Main St Apt 5 John Smith
05674
123 Main St John Smith
Apt 5
05674
123 Main St
Apt 5 John Smith
05674
For U.S. addresses, only extraneous data at the end of the address line is returned in AdditionalInputData. Extraneous data that is not at the end of an address line is not returned for U.S. addresses. For example, in the following addresses "John Smith" is not returned.
John Smith 123 Main St
05674
123 Main John Smith St
05674
The AdditionalInputData will sometimes contain the original street name or suffix if the street name was changed to obtain a match and the street name or suffix was at the end of a line. For example this address:
Precisely
4200 Parlament
Lanham MD
ValidateAddress would correct the spelling of the street name and add the suffix, returning "4200 Parliament Pl" as the corrected street address and "Parlament" in AdditionalInputData.