The telephone number of the referee should be written on your employment certificate, and the people in the embassy are most likely to call your referee directly and ask for information such as your department and position; At the same time, in order to confirm that your referee is indeed an employee of the company, the embassy may also ask the referee's position, company name, main business and business address.

The embassy may also check your company's telephone number directly, and then call that number directly to verify your work information, instead of checking it through the telephone number of the reference you provide.