Data security in non-fiscal cash registers and non-fiscal printers is minimal.  However, data security in fiscal cash registers and fiscal printers is also not satisfactory. This  paper  describes  turnover  control  devices  based  on  GPRS  terminals  for sending  data  from  fiscal  electronic  cash  registers  and  fiscal printers  to  the  server  of  Tax  Administration^[1]  in  order  to  prevent tax  evasion,  diversion  of  original  goods  from  the  distribution system  and  infiltration  of  counterfeited  or  original  goods  into  the distribution  system  without  payment  of  customs,  tax  and  excise duties.  The comparison with ordinary fiscal cash registers and non-fiscal cash registers is also provided.