A data broker can combine information from different sources and provide records or profiles to others. Finding a listing does not establish every source, recipient or use behind it. Blocking a browser request does not erase a record already held elsewhere.
The practical outcome here is a record of one verified organisation, the information or use you want addressed, the request and the actual response. The examples below use fictional cases. Keep real addresses, listing links, account details and identity documents in protected records and use verified channels when sharing them. This UK example is not a promise of equivalent rights everywhere.