Can I prevent expenditure items from being invoiced?

Yes. You can place expenditure items on invoice hold to stop the expenditure items from being invoiced. If the expenditure items are already invoiced, then they're identified for reversing during the next invoice generation and aren't eligible until the invoice hold is released.

For external or interproject billing, you can select either the Hold Invoice Once or Hold Invoice Until Released option to place expenditure items on invoice hold. For intercompany billing, you can select only the Hold Invoice Until Released option to place expenditure items on invoice hold.

Selecting Hold Invoice Once prevents an expenditure item from being invoiced until an invoice is released for a contract line which is associated with the expenditure item. Selecting Hold Invoice Until Released prevents an expenditure item from being invoiced until you release the invoice hold by selecting the Release Invoice Hold option.