 Template of June 2018 Updated November 2018  Contract number: EEAS-618-DELBRBB-SER-FWC-2019  II.21.6. Interim payments and payment of the balance  II.21.7. Suspension of the time allowed for payment  debit note is sent to the contractor. The contracting authority must release the guarantee  within the following month. Performance guarantees cover compliance with substantial contractual obligations until the  contracting authority has given its final approval for the service. The performance guarantee  must not exceed 10 % of the total price of the specific contract. The contracting authority  must release the guarantee fully after final approval of the service, as provided for in the  specific contract. Retention money guarantees cover full delivery of the service in accordance with the specific  contract including during the contract liability period and until its final approval by the  contracting authority. The retention money guarantee must not exceed 10 % of the total price  of the specific contract. The contracting authority must release the guarantee after the expiry  of the contract liability period as provided for in the specific contract.  The contracting authority must not request a retention money guarantee for a specific contract  where it has requested a performance guarantee. The contractor (or leader in the case of a joint tender) must send an invoice for interim  payment, as provided for in Article I.6 or in the tender specifications or in the specific  contract. The contractor (or leader in the case of a joint tender) must send an invoice for payment of the  balance within 60 days of the end of the period of provision of the services, as provided for in  Article I.6, in the tender specifications or in the specific contract. Payment of the invoice and approval of documents does not imply recognition of the  regularity, authenticity, completeness and correctness of the declarations and information they  contain. Payment of the balance may take the form of recovery. The contracting authority may suspend the payment periods specified in Article I.6 at any  time by  notifying  the contractor (or leader in the case of a joint tender) that its invoice cannot  be processed. The reasons the contracting authority may cite for not being able to process an  invoice are:  The contracting authority must  notify  the contractor (or leader in the case of joint tender) as  soon as possible of any such suspension, giving the reasons for it.  (a) because it does not comply with the FWC; (b) because the contractor has not produced the appropriate documents or deliverables; or (c) because the contracting authority has observations on the documents or deliverables  submitted with the invoice. 34 