Rules and Guidelines for Verification in Certified Mode

Certified mode applies all the certification standards that the postal authorities in Australia, Canada, France, New Zealand, and the United States define for address certification. The Address Verification 6.4 engine is formally certified for address verification by the postal authorities in Australia, New Zealand, and the United States.
An address that you verify in certified mode must meet the formatting requirements that the postal authority of the country specifies. For example, to verify a Canada address in certified mode, the input address can include a maximum of two postal delivery address lines. To verify a France address in certified mode, the input address can include a maximum of six postal formatted address lines. Of the six lines in France addresses, three lines must contain delivery elements other than the post box and locality information.
For certified mode, you must install the certified database files with valid license keys. You can submit 1000 addresses in a single call in certified mode.
Certified mode falls back to batch mode if the address belongs to a country that Address Verification does not support in certified mode.
If you enable certified mode and do not have the corresponding certified reference address database, Address Verification returns an N error status.