It depends on what we find. Sometimes the item we want to verify is quite trivial. For example, if there is a calculation error, we will ask the party to review its figure. If, based on certain information or complaints we've received, we think there is something else, we will ask the party to provide clarification. If it refuses to give us the information we are seeking, we will have to determine whether we believe there are possible offences involved that would warrant an investigation. The purpose of the recommendation is to see whether, before taking extreme measures, there would be a responsibility on their part to produce the appropriate documentation in support of the claimed expenses.
On October 7th, 2010. See this statement in context.