Formal acceptance will not be until the actions, stipulated in the contract documentation, have been successfully completed.
Here, the signing of a delivery note is simply acknowledging that the goods/services have been received. Within the contract there may be a requirement, for example, to commission the goods and complete acceptance tests prior to formally accepting them. If you are unsure, check with your Head of Procurement. There are a number of points that are important. Normally whenever goods are delivered and a delivery note signed, the signature signifies that the goods/services have been accepted and hence, the performance of the contract completed.
