Causative have and get: Arranging for another person to do something

Have / get + object + past participle means that someone arranges for another person to perform a service or action. The focus is on the result or experience, not on the person who does the work.

Examples

We had the roof repaired last month.

Another person repaired the roof after we arranged it.
She is getting her passport renewed.

The renewal is being arranged or carried out for her.
I need to have my eyes tested.

A professional will perform the test.

Doing something yourself vs. having it done

Active action

I painted the kitchen.

The sentence says that I personally did the painting.

Causative have

I had the kitchen painted.

I arranged for another person to paint it.

Painted the kitchen identifies the subject as the person doing the work. Had the kitchen painted presents the subject as the person arranging or receiving the service.

The same form can describe an unwanted experience

The causative-looking pattern can also describe something that happened to a person without their arranging it, especially an unpleasant event.

He had his wallet stolen on the train.

He did not arrange the theft; the structure presents an experience that affected him.
They had their flight cancelled at the last minute.

The cancellation happened to them rather than being a service they requested.