Otherwise, they should be barred from bidding in government tenders and RFPs (Requests for Proposals). Databases and Information Gathering ? Estimating the informal economy should be a priority objective of the Bureau of Statistics, which should devote considerable resources to this effort. In doing so, the Bureau of Statistics should coordinate closely with a wide variety of relevant ministries and committees that oversee various sectors of the economy. ? All registrars should be computerized: land, real estate, motor vehicles, share ownership, companies registration, tax filings, import and export related documentation (customs), VAT, permits and licences, records of flights abroad, ownership of mobile phones and so on. The tax authorities and the Public Revenue Office (PRO) should have unrestricted access to ALL the registers of all the registrars. Thus, they should be able to find tax evasion easily (ask for sources of wealth- how did you build this house and buy a new car if you are earning 500 DM monthly according to your tax return?). ? The PRO should have complete access to the computers of the ZPP and to all its computerized and non-computerized records. ? The computer system should constantly compare VAT records and records and statements related to other taxes in order to find discrepancies between them. ? Gradually, submissions of financial statements, tax returns and wealth declarations should be computerized and done even on a monthly basis (for instance, VAT statements). ? A system of informants and informant rewards should be established, including anonymous phone calls. Up to 10% of the intake or seizure value related to the information provided by the informant should go to the informant.