In the case that a contract does not expressly provide that a Payment Application should be submitted, then the payee is entitled to serve a Default Payment Notice to the payer as soon as they default (they don’t issue a Payment Notice). Again, the payer can mitigate this by issuing a Notice to Pay Less.
Default Payment Notices are validated in the same way as Payment Applications: by specifying the amount calculated to be due, how these costs were calculated, and by using the same language as the contract. This way, the amount specified by the Default Payment Notice becomes the Notified Sum; unless a Pay Less Notice is served.
It’s advised that you don’t delay if you need to serve a Default Payment Notice, as the Final Date for Payment will then be postponed accordingly. For instance, if the Payment Notice should have been received by March 1st and the Default Payment Notice is issued on the 3rd, the Final Date for Payment is then postponed for two days.
Seek legal advice from Helix Law to ensure any Default Payment Notice you need to serve is valid, and for advice on what to do thereafter.