What is the grammar structure of "arrange to have sent"? [closed]

Requests that clients send, or arrange to have sent, relevant reports from current and previous clinicians.

What is the grammar or usage of to have sent in the sentence above? Thanks


Solution 1:

The parallel construction

...requests that clients send, or arrange to have sent, relevant reports ...

abbreviates

...requests that clients send relevant reports, or arrange to have relevant reports sent ...