Company Status Testing for error scenarios

Hi ,

We are fetching the company status by passing the company registration number to public data API an input and updating the record in salesforce with status value. we would like to understand the what error scenarios we can test and how ?
and we do not see any company status filters for ‘Registration’ / ‘Removed’ status

Request to guide on the development cycle and production support in feature what options we have.

Bakkaiah M