If you choose to validate the addresses in the interface tables before importing them into the TCA Registry, the addresses are validated using address validation adapters. An adapter connects TCA to an external source of information, which provides the validation service.
Each address is validated through the default adapter set up for each country. For example, if the Vision adapter is the default for Thailand, then all Thai addresses in the interface tables are validated against Vision's standard addresses.
If an address from the interface tables differs from the validated address, it is updated with the validated address only if it is valid above the threshold defined for the adapter. Such an update is called an address correction. For example, if the adapter configuration has the threshold at the municipality level, an address in the interface tables is corrected if at least its city or town is valid.
Note: Aside from the validation threshold, address correction only occurs if the update does not violate other validations, such as tax validation rules.
After the addresses are validated and corrected in the interface tables, they are ready for import into the TCA Registry.