Work-experience documents in Turkey and international tenders: the master guide to what actually counts

The first rule is to stop using the phrase “work completion certificate” as if it meant the same thing everywhere. In Turkish public procurement, work experience is governed by a defined statutory and regulatory system with named document types, issuing authorities and EKAP processes. In a World Bank, ADB, AfDB, IsDB, EU or other international tender, the evaluator may instead ask whether the bidder has satisfactorily or substantially completed one or more similar contracts and whether that experience can be evidenced through the forms and supporting documents specified in the bidding document. The evidence may include a completion certificate, but the qualification question is not automatically determined by whether a Turkish EKAP record exists.

This distinction matters most for private-sector projects. A Turkish contractor may have built a factory, power plant, hotel, industrial utility system or logistics facility for a private employer. The project may have no public-procurement history at all. Under the Turkish construction-procurement regime, there are specific rules for obtaining and using experience documents for domestic private-sector works. In a separate international tender, however, the receiving institution may simply require proof of the contract value, dates, scope, completion status, key quantities and the bidder's actual participation. If the live international bidding document does not restrict qualifying experience to public employers, the fact that the original client was private does not by itself make the experience unusable.

The same separation is needed for the 80% question. In Turkish construction procurement, a continuing contract can support a “work status certificate” only where the regulatory conditions are met, including completion of the initial contract amount and at least 80% realization of the total contract amount, together with the other quality, payment/accrual and dispute-related conditions. That is not the same as saying that an unfinished project has a Turkish “work completion certificate.” By contrast, some World Bank qualification documents define “substantial completion” for experience purposes as 80% or more of the works completed under the contract. The number can look identical while the legal and procurement meaning is completely different.

Participation status is another area where labels can mislead. A firm may have acted as sole main contractor, JV member, management contractor or subcontractor. Turkish rules have their own document types and conditions, including a specific subcontractor work-completion document in eligible cases. International MDB forms often ask the bidder to disclose whether it was a JV partner or subcontractor and to state its percentage and amount of participation. The relevant experience is then tested against the live qualification criterion. The correct question is therefore not “Was the company the main contractor?” but “What did this legal entity actually perform, for what value, with what responsibility, and how does the procurement document say that participation should be counted?”

A strong bidder maintains two related but separate evidence architectures. The first is the Turkish compliance file: EKAP records where applicable, issued work-experience documents, contracts, acceptance minutes, invoices and the records required by current KİK rules. The second is an international qualification dossier for each project: signed contract, amendments, scope and BOQ extracts, completion or taking-over evidence, employer confirmation, payment/certification evidence where needed, key quantities, bidder participation, JV/subcontract agreement, employer contact details and certified translations. One archive can support both systems, but the submission package should be built for the specific procurement regime rather than copied mechanically from the previous tender.

Gokbilge's role in this area is technical and bid-governance oriented. The company can help turn project history into auditable qualification evidence by mapping reference contracts to the live criteria, separating legal-entity participation from group-company claims, extracting key quantities and technical similarity, building clarification-ready evidence registers and identifying gaps before the bid deadline. Formal legal opinions, notarisation, apostille and country-specific authentication remain matters for qualified legal/notarial/consular professionals, but the engineering content and evidence logic should be controlled by the bid team long before those final formalities begin.

This article compares Turkish public-procurement work-experience rules with international tender qualification practice. The applicable tender document, procurement framework, current Turkish legislation, country law and issuing/receiving authority requirements always govern the specific case. It is not legal advice. Requirements can change by procurement package and date, so bidders should verify the live tender documents and current official rules before submission.