farhaantariq said:
Sometimes they contact all your employers/referrers to verify the information. Sometimes they actually make a physical visit, unannounced, though that is rare and usually only happens if they suspect you have not been truthful. Sometimes they interview you though this is also rare nowadays. Sometimes they ask for updated bank statements/proof of funds. They always conduct security and background checks, and though they do not discuss the methods they use one can reason that they are using record search firms in the places where you have lived and international databases maintained by organizations like INTERPOL and probably lists of suspected terrorists/criminals/smugglers they get from their own intelligence agencies and those of other countries such as the USA and UK, with whom they cooperate closely. The details of what happens in the local VOs is a bit of a black box.
