Can you find out from your back tone whether you have worked as a security guard?

Yes, you can check your work experience three years ago.

Mainly depends on the rigor of the back sound. If you are particularly careful, generally all work experience after graduation will be inquired; If it's just a formality, generally only the latest work experience will be confirmed.

Methods of background investigation:

1, interview method: the investigator answers the interviewee directly.

2. Questionnaire method: the investigator printed the questionnaire in advance, distributed it to relevant personnel, and collected and analyzed it after filling it out.

3. Literature method: collecting second-hand materials such as newspapers, magazines and books.

4. Electronic media collection method: collect information through telephone, computer, radio and other media.

5. Observation method: Investigators visit the investigation site to collect dynamic information of things.

6. Experimental method: Conduct field experiments on the research content.