Who should I write as the guarantor in the job application form?

Write about the person who introduced you to the company.

When you join a company, generally speaking, the guarantor in the job application form can be filled in by the person who introduced you to the company, or an old employee who is already working in the company, or someone from an agency. If there is no one to introduce you, the company will probably not require you to fill in a guarantor. If you want, you can also communicate with the leaders of your own company, or fill in the friends who have business dealings with the company and are familiar with it.

A guarantor refers to a person who makes a certain guarantee for something or an event.