Is Your Working Paper ICAI-Inspection-Proof?
"What is the proof that this is not subsequently edited?" is the kind of question a partner asks after they've already been through a peer review or two — and it cuts to something a lot of working-paper discipline misses. A correct number isn't the whole standard. SA 230 requires documentation sufficient for an experienced auditor, with no prior connection to the audit, to understand the work performed, the evidence obtained, and the conclusions reached — and increasingly, inspectors want to know the documentation trail is itself trustworthy, not just the numbers inside it.
Two separate bars, not one
A working paper that satisfies "the number is correct" doesn't automatically satisfy "this stands up to inspection." The gap is in three places most firms don't systematically address: whether every procedure performed is aligned to the specific Standard on Auditing it discharges, whether the file can prove nothing was altered after the fact, and whether a reviewer who wasn't on the engagement can actually reperform the work from what's written down — not just read a conclusion and take it on faith.
Alignment: every procedure tied to a standard, not a checklist item
"In each and every scrutiny performed, is it aligned with the Standards on Auditing?" is a fair question to ask any tool that automates working papers, because the answer often turns out to be "loosely." A journal-entry testing procedure that doesn't cite SA 240, a sampling methodology that doesn't reference SA 530's formula, a going-concern assessment that doesn't map to SA 570's indicators — these are the gaps an inspector finds fastest, because they're looking for exactly this: does the work performed trace back to the standard that required it, with the citation visible in the paper itself, not just implied.
Edit-proof: proving the trail wasn't touched after the fact
This is the part that comes up in conversations comparing tools to established documentation platforms — the specific ask for cryptographic, timestamped evidence that a working paper wasn't quietly revised after sign-off. On CORAA, every action across the engagement is logged per SA 230 — upload timestamps, the auditor's acceptance or override of any AI-suggested classification, and a versioned history of every material change — so the file itself carries proof of its own integrity, not just an assertion that nothing was changed. A locked plan (materiality memo, sampling plan) stays read-only; revising it requires a documented re-evaluation note explaining what changed and why, which becomes part of the trail rather than replacing it.
Reperformability: the actual SA 230 standard, not a paraphrase
SA 230's real bar is that an experienced auditor with no prior connection to the engagement should be able to understand the work performed from the documentation alone. That means a sampling selection needs to be reproducible with the same seed producing the same vouchers, not just "we sampled 40 items" with no way to verify which 40 or why. It means a materiality computation needs to show its inputs and formula, not just a final number. Working papers that are genuinely reperformable are also, not coincidentally, the ones that survive an FRRB or QRB feedback cycle intact, because the reviewer's job is exactly this reperformance exercise.
What this looks like in practice for engagement checklists
Beyond individual working papers, the broader engagement — engagement letter formalities, management representation letters, the overall documentation checklist ICAI expects — benefits from the same discipline. A checklist covering Standards on Auditing, quality control standards, accounting standards, and ICAI guidance notes, tracked against the actual engagement rather than as a generic template, is what turns "we think we're compliant" into something you can actually demonstrate.
Frequently Asked Questions
What's the actual SA 230 standard for working paper sufficiency?
Documentation sufficient for an experienced auditor with no prior connection to the audit to understand the work performed, the evidence obtained, and the conclusions reached — not just a correct final number, but a reperformable trail.
How do you prove a working paper wasn't edited after sign-off?
Through a cryptographic, timestamped audit trail logging every action on the engagement — uploads, classification overrides, material changes — so the integrity of the file is provable, not just asserted. Locked plans (materiality, sampling) stay read-only; revisions require a documented re-evaluation note.
Does every procedure need to cite a specific Standard on Auditing?
For inspection-readiness, yes — a procedure without a visible citation to the SA it discharges (SA 240 for journal-entry testing, SA 530 for sampling, SA 570 for going concern, etc.) is one of the fastest gaps an inspector or peer reviewer finds.
What makes a sampling selection "reperformable" versus just documented?
A seeded, reproducible selection where the same inputs produce the same sample every time — so a reviewer running the same seed gets the same vouchers, rather than "we sampled 40 items" with no way to independently verify which 40 or why.
Related: Working Papers module · Start a free trial