第一次申请 请问这个list a9 是合同嘛

A9-Current Employer’s letter stating the date of employment, position held, salary per month for the past 6 months with breakdown into basic, overtime and allowance per month. The letter, addressed to the Controller of Immigration, should be dated within 1 month from the date of submission;
这个是合同嘛 还是要公司出信？【小公司，不会出信的 ，我们公司看不给外劳任何方便】