Many MiFID II/MiFIR requirements shall have a significant impact on IT in the organisations, which are subject to those requirements. The requirement of transaction reporting to the Polish Financial Supervision Authority shall now also extend to instruments admitted to MTF and OTF, and, in the future, also IRS, FRA, and OIS transactions or the transactions in which the underlying instrument is admitted to the regulated market, MTF, or OTF. Therefore, it shall not be possible to do all the reporting in the manner in which it has been done so far, through the stock exchange. The amount of the transmitted information is increasing considerably and is not much less than in the EMIR reporting.