Dear Sir or Madam,
Given the mandatory registration of guests by means of registration forms at the Police or by using the eGost programme, SURS can obtain this type of data from the Police and thus does not impose any additional burden on the service providers. This kind of problem (point 11 of the minutes http://www.stat.si/doc/sosvet/Sosvet_05/Sos05_s1790-2012.pdf) was discussed on 15.12.2010 at the 9th meeting of the Statistical Panel for Tourism Statistics, but nothing more has happened in all these years!
Regards.