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Frequently Asked Questions - ESIDIS

ESIDIS Frequently Asked Questions

What is ESIDIS?

The initials stand for National System of Electronic Public Contracts, and it is the electronic system of the Ministry of Development and Competitiveness through which tenders are submitted by prospective suppliers of the Government.

How can I participate in Public Electronic Tenders? 

A condition for the participation of companies in electronic tenders of the Public sector is that the users hold Recognized Digital Certificates from a Certification Provider accredited for their issuance. Only in this way will they be able to digitally sign documents. First of all, in order to obtain the above possibility, it is necessary to have the appropriate reliable device (usb token). Qualified Certificates are created and stored securely in it. Then, the correct installation on a PC is required.

What does the term "electronic bidding" mean?

It is the process of submission of bids by prospective suppliers, in accordance with the terms of the electronic tender announcement. 

What are the Technical Specifications required in all competitions?

The technical specifications should be drawn up in accordance with what is defined in each announcement and define the minimum necessary features required, in order to meet the needs of the organization.

How can I register in ESIDIS?

For registration, the following procedure is followed: Financial entities, through the system website (, and from the link "Register as a financial entity", request their registration in it (providing the necessary information and accepting its terms of use) identifying themselves as follows:

Those of the above who have a Greek Tax Registration Number (AFM) are identified using the credentials (username and password) they possess from the TAXISNet system of the General Secretariat of Information Systems. Once the identification is made, the user's registration is approved by the Planning and Data Department of the Procurement Policy Directorate of the General Directorate of State Procurement.

What should I pay attention to when submitting an offer to ESIDIS?

It is recommended that you carefully read each announcement and give extra gravity to all points of the competition. For example, it is necessary to know the acceptable dates within which the supporting documents must have been issued, or if a signature and seal of the company is required on the supporting documents, etc.

What should I do in case there are "ambiguities in a tender?" 

For any points where it is not clear what exactly is required by the Contracting Authority, it is recommended that the company contact the Contracting Authority immediately, in order to provide clarifications. Given that the process of Public Electronic Tenders is relatively new for all parties involved (even for the Tender Awarding Bodies themselves), it is necessary to communicate verbally or even better in writing with the respective responsible - author of the tender regarding the resolution of questions or any clarifications for problems with the process.

After submitting a quotation can I change the prices? 

The submission of the offer in the information system is final and no listed information can be changed later. 

Can someone see what prices I have declared? 

Only after the unsealing of the technical/financial offers, will everyone have access to the information system to check the supporting documents of the participants and to carry out any objection or appeal.

What preparation will be needed to participate in a Public Electronic Tender? 

It is important that interested companies wanting to participate in Public Sector tenders, prepare in time to obtain a digital signature and the relevant recognized certificate, as well as be trained in this regard in order to ensure their successful participation in electronic tenders.

What are CPV codes? 

CPV (Common Procurement Vocabulary) is a single classification system for public tenders, which standardizes procurement, works or services. In this way public contracts are coded based on a vocabulary. The use of CPV is mandatory in the European Union since February 1, 2006. See the CPV vocabulary in detail here


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