How should a property maintenance worker knock on the door when he goes to the owner's house for maintenance?

When the owner checked in, he registered detailed materials. If he comes home for maintenance, he can contact the owner in advance to see if there is anyone at home, which is convenient.

If it's inconvenient, you can make another appointment.

It's time. Knock on the door when you come, put on the uniform of the property and bring your documents.