案情简介职工杜××于2013年1月18日通过邮寄方式向山东省劳动保障监察总队递交投诉材料,投诉××公司,要求用人单位为其补缴2009年6月至2010年5月的社会保险费。投诉材料中杜××称在2011年5月申请劳动仲裁时提出过单位补缴社会保险费的问题,也曾多次向青岛市人社局和市南区人社局劳动监察投诉过所在单位未缴纳社会保险费,但这些单位未给予正式立案。本着对投诉人负责的态度,监察总队对相关信息进行了核实。经查,杜××于2011年5月23日向 Brief introduction of the case The employee Du × × submitted the complaint materials to Shandong Labor Security Supervision Corps by mail on January 18, 2013, filed a complaint against XX company, and asked the employer to pay the society from June 2009 to May 2010 insurance. Complaint material Du × × said in May 2011 when applying for labor arbitration unit made the payment of social insurance premiums, but also on many occasions to the Qingdao Municipal Bureau of Social Affairs and Municipal Human Resources and Social Council Bureau of labor complaints over the unit Social insurance premiums were not paid, but these units did not formally file a case. In a responsible manner to the complainant, the Corps inspected the relevant information. After investigation, Du ×× on May 23, 2011 to