4.3. Signature policy: how can documents be signed?  4.4. Confidentiality of tenders: what information and under what conditions  can be disclosed?  21 • For the purposes of evaluating the tender and, if applicable, implementing the  contract, performing audits, benchmarking, etc., the  Contracting authority is  entitled to make available (any part of) the tender to its staff and the staff of other  Union institutions, agencies and bodies, as well to other persons and entities  working for the  Contracting authority  or cooperating with it, including contractors  or subcontractors and their staff provided that they are bound by an obligation of  confidentiality.  • After the signature of the award decision tenderers whose tenders were received in  accordance with the submission modalities, who have access to procurement, who  are not found to be in an exclusion situation referred to in Article 136(1) of the FR,  who are not rejected under Article 141 of the FR, whose tenders are not found to  be incompliant with the procurement documents, and who make a request in writing  will be notified of the name of the tenderer to whom the contract is awarded, the  characteristics and relative advantages of the successful tender and the price of the  offer and/or contract value. The  Contracting authority may decide to withhold  certain information that it assesses as being confidential, in particular where its  release would prejudice the legitimate commercial interests of economic operators  or might distort fair competition between them. Such information may include,  - The Tender report;  The Declaration on Honour of the tenderer (in case of joint tender – the Declarations  on Honour of all group members);  - (If applicable – in the case of joint tender) the power(s) of attorney drawn up using  the model attached in  Annex 3 ).  Where a document needs to be signed, the signature must be hand-written or using  qualified electronic signature. For hand-written signatures see Section 1 of the Invitation  to tender.  All documents must be signed by the signatories (when they are individuals) or by their  duly authorised representatives.  For the following documents, when signed by representatives, tenderers must provide  evidence for the delegation of the authorisation to sign:  The delegation of the authorisation to sign on behalf of the signatories (including, in the  case of proxy(-ies), the chain of authorisations) must be evidenced by appropriate written  evidence (copy of the notice of appointment of the persons authorised to represent the  legal entity in signing contracts (together or alone), or a copy of the publication of such  appointment if the legislation which applies to signatory requires such publication or a  power of attorney). A document that the Contracting authority can access on a national  database free of charge does not need to be submitted if the Contracting authority is  provided with the exact internet link and, if applicable, the necessary identification data to  retrieve the document.  Once the  Contracting authority  has opened a tender, it becomes its property and shall be  treated confidentially, subject to the following: 