When creating invoices, or when trying to add time and cost cards to an existing invoice, you cannot find them. You know they are approved, Why aren't they showing up!!!
The primary cause of this is contract terms. If you have a Fixed Price contract, time and cost cards are not pulled onto invoices. Review your contract terms.
The secondary cause is that the cards actually aren't approved. Make sure your report or query isn't including unapproved time or cost.
The third cause we see is that the cards are already on another invoice.