After the train ticket is successfully refunded, will the person who booked it for me receive a text message?

Yes, because it is his account, the booking refund information is sent to his mobile phone.

Check the refund direction:

1. Login account first 12306.

2. Click my 12306 to place an order.

3. Choose the date of purchase to expand the scope.

4. Click Query, as shown below.

5. Find the corresponding order and click.

6. Then click on the refund details.

7. Check the refund amount and refund status here.