@greatsoul , tama si @buscato , pede yan proof SSS contribution, either gawa ka account online sa website ng SSS then print, or punta ka sa sss branch na malapit sa lugar nyo, pede rin bank statement, basta naka reflect yung salary or yung company na nag credit dun sa payroll account mo, contract of employment or certificate of employment and compensation, naka indicate yung salary, leaves etc..