Obtain a detailed schedule of deferred revenue balances and agree to general ledger.
Ensure that the basis for deferring revenue is consistent with prior years and generally accepted accounting principles by, for a selected sample:
1 examining supporting documentation to validate the accounting treatment
2 evaluating the recoverability of the entry if the expectation of future benefits appear to be reasonable, consider operating results, prevailing economic conditions etc.
Document basis for sample size and selection.