@ Lullaby : extend your thinking of the overall. Softwares are done to reports CRS. Softwares don't care to report with missing infos, mistakes, by defautl. Once datas are reported in your home country with a wrong end, don't you think your Tax Man can use another usefull software to cross datas for what he needs to make clear, in case he's searching for something precise........?
Lullaby, looks like your concern is same for me.
Please can you explain about : what is your fear with CRS and Pre-Paid Card. What/how/why are you trying to avoid - escape ?