Means of Proof

Means of proof are the documentary evidence that transforms a self-declaration into a verified fact. The entire ESPD system is built on the principle that suppliers declare compliance at bid stage and submit the actual evidence only when required. Means of proof are the "actual evidence" stage: the real certificates, audited accounts, references, and registrations that substantiate what the supplier declared in its ESPD Response.

What are means of proof?

Article 60 of Directive 2014/24/EU defines the means of proof contracting authorities may request. They fall into two groups.

For exclusion criteria. The primary means of proof for exclusion grounds is the criminal record certificate for mandatory criminal conviction grounds. For tax and social security compliance, the relevant tax compliance certificate and social security compliance certificate are standard. For other discretionary grounds (insolvency, professional misconduct, conflict of interest), contracting authorities may request declarations from competent authorities, court extracts, or other national documents identified through eCertis.

For selection criteria. The means of proof vary by criterion type. For economic and financial standing: audited or certified annual accounts, bank statements or evidence of insurance, statements of overall turnover or sector-specific turnover. For technical and professional ability: lists of contracts with value, date, and recipient (public or private); certificates of satisfactory execution; staffing statements; equipment lists; professional competence certificates; quality management certificates; and environmental management certificates.

Article 60(4) of Directive 2014/24/EU establishes an important administrative simplification: where the relevant document is directly accessible free of charge from a national database, the contracting authority must accept the database reference rather than requiring the supplier to obtain and submit a paper copy. Contracting authorities are also encouraged to use administrative cooperation mechanisms to obtain documents directly from the issuing authority in another member state.

The eCertis system is the reference tool for identifying which national document constitutes the accepted means of proof for a given criterion in a given member state.

Why means of proof matter for bidders

Means of proof are requested at the end of the process, typically before contract award is confirmed. Being unable to produce a required document at that stage can result in the loss of an otherwise won contract and potential exclusion consequences.

Good bid management practice keeps a current library of key means of proof: up-to-date criminal record certificates for directors (which have short validity periods in many member states), current tax compliance and social security letters, and renewed professional and quality certificates. Knowing the renewal dates of your certificates and attestations prevents scrambling at the point of award.

Example

A Portuguese IT firm is ranked first in a European Commission tender. The Commission's contracting service requests means of proof within ten working days. The firm submits: a criminal record extract from the Portuguese criminal record registry for its three directors, a tax clearance letter from the Portuguese Tax and Customs Authority, a social security compliance certificate from the Social Security Institute, and its current ISO/IEC 27001 certificate. All documents are dated within the six-month validity window specified in the tender documents.

Frequently Asked Questions

How recent do means of proof need to be?

Contracting authorities typically specify a maximum age for means of proof in the tender documents, commonly three to six months before submission. If your documents expire during a long procurement process, plan to renew them before the award stage.

Can I submit copies, or do originals need to be provided?

This varies by member state and by contracting authority. Many now accept certified copies or documents submitted through electronic registers. Some still require notarised originals for criminal record certificates. Check the specific requirements stated in the tender documents and clarification Q&A.

What if a required certificate is simply not issued in my country?

If your country does not issue a certificate equivalent to the one requested, you may substitute a solemn declaration or sworn statement made before a competent judicial or administrative authority. Article 60(2) of Directive 2014/24/EU permits this where the relevant national law does not provide for the document requested.