Frequently Asked Questions (FAQ)

Tiresias Registries do not contain financial evaluation or other assessments of the data included therein. Such data are exclusively assessed by their recipients, who evaluate them in conjunction with their own data, always bearing in mind the financial transaction to take place and their credit policy.
Consequently, the data kept in Tiresias Registries are of a subsidiary nature and under no circumstances do they obligate, compel or deter the recipient from entering or not entering into a financial transaction.

Information may be provided to you (exercise of right to access) solely via Tiresias, which keeps the registries and functions as the Controller

Α. By providing Tiresias with the appropriate supporting documents in order to supplement or erase the data that concern you, as appropriate. 

Β. By settling your financial obligations in good time (payments of instalments, bills of exchange, cheques, etc.) and by not accepting financial risks which you are not certain you will be able to cope with in the future.

In order to receive the best possible service when visiting Tiresias offices regarding any transaction, please have your police-issued identity card or passport with you and be aware of your tax identification number (TIN).

If you send the supporting documents via e-mail or post, please use the standardised application forms.
Moreover, in each case and depending on your request (supplementation - rectification/erasure of data etc.), the relevant supporting documents will be required. For any further information, contact our call centre.

You have the following rights:

A. Right to Access

To know which of your personal data Tiresias keeps and processes, their source, the purposes for which they are being processed, and the period of their retention by register or as a whole. Furthermore, in the context of exercising your right of access, you may also request information on searches made about you by the recipients of our registers during the last six months (number and source), including any activation of the alarm notification in cases of entry or erasure of data which concern you.

B. Right to Rectification

To request the rectification and/or supplementation of your inaccurate personal data so that they are complete and accurate.
In this case, you must present all necessary documents evincing the need for rectification or supplementation. In cases of rectification, Tiresias will notify recipients of the rectified data during the last six months or any shorter period when the data in question were entered in the register.

C. Right to Restriction of Processing

To request the restriction of processing of your data. The right to non-transmission of data, as described below, is also an expression of the right to restriction of processing.

D. Right to Object

To refuse and/or object to any further processing of your personal data kept by Tiresias, including ‘scoring’ (creditworthiness scoring system).

E. Right to Erasure / Right to Be Forgotten

To request erasure of your personal data from the registers kept by Tiresias, in accordance with Article 17 of the GDPR. In cases of erasure of data, Tiresias will notify recipients of the erased data during the last six months or any shorter period when the data in question were entered in the register.

F. Right to Portability

To request portability of your data, in accordance with the conditions laid down in the General Data Protection Regulation.

Please note the following with regard to exercising the above rights:

  • The data Tiresias enters into its registries are absolutely necessary in order to serve the processing purpose, while the processing it carries out and the keeping of data is necessary for its compliance with a legal obligation and for the purpose of serving the legitimate interests of the data recipients (which override the rights and freedoms of the data subjects) and the performance of agreements concluded between them (credit and financial institutions, for whom credit bureau registers functions) and data subjects.

In accordance with the foregoing, Tiresias has the right to refuse your request for restriction of or for erasure of your personal data or your objection to processing if the request is not sufficiently substantiated, if the processing of the data is necessary in accordance with the law and for the establishment, exercising or defence of its legitimate rights.

  • Despite the foregoing and the fact that this right is not provided for in the General Data Protection Regulation (GDPR) but is conferred on data subjects under the regulatory framework laid down in Law 2472/1997 and the regulatory decisions of the Authority as a form of the right to object provided for therein, if you so wish, Tiresias may cease transmitting data which concern you to the recipients of its registers, in which case a relevant indication (on the non-transmission of data) will be displayed.
    The above right is a more specific expression of the right to restriction of processing (Article 18 of the GDPR).

The exercise of the above rights applies for the future and does not concern data processing already performed.

G. Right to Complain to the HDPA

To lodge a complaint with the Hellenic Data Protection Authority (, where you consider that your rights have been infringed in any manner.

The Company has designated a Data Protection Officer in accordance with Article 37 of the General Data Protection Regulation (tel.: 210 36.76.700,, 2, Alamanas Street, GR-15125 Marousi).

The Retention Period of the data kept by Tiresias in its aforementioned registries is according to ar. 40 Ν. 3259/2004, as modified by ar. 70 Ν. 3746/2009 and ar. 4 Ν. 3816/2010 and is in effect.

With regard to the DFO & MPS, please see the Which Data are Kept section
Credit Consolidation System (CCS) data are forwarded to Tiresias using electronic means via:

- Credit institutions
- Credit companies
- Leasing companies
- Factoring companies
- Card issuance and management companies
- Credit servicing firms
- Payment institutions, where they provide credit
- Electronic money institutions, where they provide credit
- The Engineers’ and Public Works Contractors’ Fund (TMEDE) (hereinafter “Bodies”), which are solely liable for the accuracy of the data.


If you are a sponsor for a loan or card and the competent credit - financial institution discloses the relevant information and your name, the relevant information will be entered into the Credit Consolidation System under your particulars, with the indication that you are a sponsor.

In the event of termination of the loan or credit card agreement, following a disclosure by the competent credit - financial institution, the relevant information will be entered into the Default of Financial Obligations System (DFO) and Mortgages and Prenotations to Mortgages System (MPS) under your particulars, with the indication that you are a sponsor.

If a payment order is issued on the basis of this report, the information concerning issuance of a payment order will be entered into the Default on Financial Obligations Register under your particulars, with the indication that you are a sponsor.

No. In accordance with Decision No 109/1999 of the Hellenic Data Protection Authority (24/ 2004, Government Gazette, Series II, Issue 684/ 11.5.2004), the provisions of Article 40(2) of Law 3259/2009 and the GDPR, your consent is not required for such processing.

Information concerning the issuance of a bounced cheque is entered solely in the name of the issuer. However, if a payment order is issued on the basis of this cheque against the endorser as well, then the information in question shall also be entered in the name of the endorser.

Data on credit consolidation are kept for five years from the date they were last updated by financial bodies. This applies whether the information is forwarded by the body in electronic form or provided by the interested party in the form of an attestation issued by the body in writing.

Data relating to letters of guarantee and documentary credit are kept in the registry for 5 years from the forfeiture/non-payment of the letter of guarantee or documentary credit, respectively. In cases of timely payment, such data are automatically erased.

Credit consolidation data are kept by for five years after they were last updated by the credit bodies.

Your score is generated on the basis of all your data appearing in the credit bureau registers kept by our company (DFO & MPS - CCS) using statistical models which compute it on the basis of a statistical valuation of past transactional behaviour; this score is dynamic and changes whenever the data that concern you change.

Factors which may affect your score include but are not limited to:
- Delays in repaying financing debts
- Presence of data concerning defaults on financial obligations (DFO)
- Timely payment of financing debts
Your score is evaluated exclusively by the credit and financial institutions which requested it, which make the relevant decision on whether or not to extend a loan or credit, taking into account the other information available to them and their credit policy. Therefore, your specific score at any given time alone does not result in the extension or non-extension of a loan/credit.

You can find the conditions and supporting documents required on our Greek website.

The Credit Consolidation System (CCS) also displays any delays in the repayment of credit debt. Delays in repaying your debts is one of the factors affecting your score.

- Accepting cards previously declared as lost or stolen.

- Accepting cards not issued by the financial body or corresponding foreign body (e.g., counterfeit or forged cards).

- Conducting or entering real or sham transactions without authorisation from the holder.

- Infringing the terms of the cooperation agreement concluded between the enterprise and the financial body on accepting cards not falling under the above cases.

- Enterprises considered Common Points of purchase. In other words, enterprises where card data interception has occurred.

- Money laundering.

- Enterprises declared bankrupt, placed under liquidation or compulsory administration or not operating for any reason or which have been wound up.

- Altering the transaction amounts in the charge sheets issued during transactions.

- Self-financing. This concerns the creation of sham transactions on one's own behalf or on behalf of relatives.

- Breaking up of transactions into numerous smaller transactions (e.g., issuance of several charge sheets for one transaction, so that the total transaction amount is divided into smaller amounts not exceeding the enterprise’s limits on transactions involving unapproved cards).

- Inaccurate card issuance applications transmitted by the enterprise to the financial body in the context of their cooperation.

- Inaccurate cooperation application filed by the enterprise with the financial body. This concerns cooperation applications containing inaccurate or false information.

- Realisation of transactions invoking illusory approval.

- Excessive number of charge backs / transaction disputes.

The assignment information is entered into the Register of Assigned Claims under Contracts / Certification of Execution of Public Works (CCEPW) following disclosure by the bank to which the claim arising from the contract or the certification was assigned.

The Registry contains published acts (incorporation, amendment to Articles of Association, merger, etc.) and the company details published therein, including data which concern the directors, managers and partners of companies.

You can be informed by the Public Service Office whenever you wish, free of charge, whether you are a natural person or own an enterprise or are a freelancer:

  • By sending an email to and attaching the application for exercising the right of access of a natural/legal person, which you will find on the Public Service Office page, with your signature certified by a Public Authority or through "e-dilosi".
  • If you wish to receive the answer electronically, you should complete the application via, so that we can identify you. Otherwise, for security reasons, the reply will be sent to you by registered mail.
  • At our offices, Alamanas 1, 151 25 Marousi, after an appointment that you can schedule calling at 210 3676700 on working days, from 9:00 a.m. to 4:00 p.m. Public service hours: from 8:30 a.m. to 2:00 p.m.
  • By post, to the Public Service Office, Alamanas 1, 151 25 Maroussi.

In the international literature, a Credit Bureau or Credit Reference Agency is defined as a legal entity, which processes a creditor's customer information in order to support creditors in the process of evaluating the creditworthiness of their customers. The World Bank defines as a condition for the operation of a Credit Bureau the processing of bank data.

Historically, the first Credit Bureaus appeared in the United States of America after the financial crisis of 1837, while in Europe they appeared a little later. The main purpose of Credit Bureaus was the exchange of information between creditors about the creditworthiness of customers, who received products or services on credit. Over time, the exchange of information through Credit Bureaus covered many sectors of the economy, was computerized and automated. Today, Credit Bureaus operate in most countries worldwide.

In all EU member countries, which have such mechanisms, it has been proved that the systems for exchanging data on the credit behavior of borrowers have contributed substantially to the development and protection of the institution of bank credit, to the reduction of credit risk, the consolidation of financial transactions and the smooth functioning of the financial market.

The function of a Credit Bureau in an economy solves the important problem of information asymmetry between the creditor and the borrower since, as a general rule, the borrower knows his/her financial profile better than the creditor, to whom he/she turns for lending.

Through a Credit Bureau, the creditor obtains a comprehensive credit picture of the creditworthiness of the borrower and can proceed with loans to borrowers, when they estimate that the borrowers have the ability to repay these loans. Thus, the creditor, on the one hand, reduces the credit risk that they manage in their loan portfolio and, on the other hand, they protect the borrower from a loan that he/she will not be able to pay.

Therefore, at the macroeconomic level, over-leveraging of the private sector is avoided.

Generally, Credit Bureaus, as Data Exchange Systems, have been proved to play a key role in the development of the infrastructure of the financial system and, consequently, the economy of a country, and that is why they are one of the three main pillars of an efficient economic system, contributing to the financial stability of a country.

It is noted that the information in the Registries of a Credit Bureau are of an auxiliary nature for the creditor and do not oblige them to carry out or not a transaction. They help them though better document any decision they take.

However, Credit Bureaus do not help creditors only. Through the knowledge they provide to borrowers about their financial picture and creditworthiness, they help them borrow responsibly. That is, to borrow, based on their real obligations, in order to be able to repay them consistently and, by extension, to maintain a healthy financial profile, avoiding possible future problems.

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