After the chimney sweeping, the sweep will give you a chimney sweeping certificate. The chimney sweep will use the certificate to report the measures taken and any faults and deficiencies detected.
You can use the chimney sweeping certificate to prove to the rescue department that you have appropriately taken care of chimney sweeping.
Keep the chimney sweeping certificate until the next time your chimney is swept.
The chimney sweep also directly notifies the rescue department of any defects that may be a fire hazard.