Q: Why would the results of the AVS check be unknown?
A: The main reasons for the results of the AVS checks being unknown are:
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The relevant address data was not passed in with the transaction – the address numeric check is carried out across the Address1, Address1, Address3, Address4, City & State fields – if none of them are present, then the state of the address numeric check will be unknown. Similarly, the post code check is carried out of the field PostCode & if that is not present, then the state of the post code check will be unknown.
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If the transaction is a cross reference transaction & the respective address information was not submitted with the transaction, or was not submitted or unknown for the transaction being referenced, then the result will carry forward to this transaction
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If there was a problem contacting the provider, or the provider itself had a problem delivering the results of the AVS checks (least likely reason)
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