If you need to authorize someone to carry out an inspection, here is a simple template you can use to write an inspection authorization letter.
[Name and Address of the receiver]
Subject: Inspection Authorization Letter
This is to inform you that we have received your request to inspect [Explain what is to be inspected]. For the same inspection, we authorize our representative [Name of the person to be authorized].
[Explain the purpose and process of inspection]
For the final report, the permitting authority may inspect again in the near future.
Please feel free to contact us in case of any doubt concerning this letter.
[Name of the sender]