I will start working at a new company very soon and I am excited because it is my dream job. They have previously made me an offer and I have accepted it, and I have signed the employment contract and mailed it back to them.
Now they have contacted me to request details of a referee at my current place of employment.
I want to know if this is the usual way of handling things, and what they could ask my current employer so close to my start date. Although part of it is curiosity, I am mainly worried about the likelihood of the offer being withdrawn and whether I should continue applications with other companies.
I was under the impression that the employment contract with both my signature and the company director's signature were final, but I am not so sure now.