Pick a scenario pack
Slack seat drift, Teams guest sprawl, or WhatsApp conversation overage — each pack includes a redacted invoice and two admin exports that disagree on purpose.
Billing Audit Lab
A practice room for financial auditing app workflows on communication platform billing — safe data, real friction, no production risk.
How a lab session runs
Bring curiosity; we supply the messy CSVs.
Run a sampling pass
Use the financial auditing app checklist to choose cost centers, not to read every row. Instructors watch for “full-file panic” and interrupt it.
Write a one-page finding
Evidence, impact in HKD, and a single ask. Peers mark what would confuse a controller.
What is included
Scenario packs, annotated answer keys released after your attempt, and a cadence template for light monthly reviews.
What is not
We do not connect to your live tenants. Lab access is for practice files only — production reviews stay on your side of the firewall.