Block settlement to auc for downpayment

Hi SAP Friends,

There is a specific requirement in one of our project.

In an investment project, advance payment is issued against a service PO with ref to WBS. The requirement is to block the settlement to AUC for this advance payment only until service entry acceptance is made. Other commitment in the WBS should go as usual without problem with regular path of setlement to AUC and from AUC to Fixed asset.

Regards

Srinivasan