The 30/60/90 method for expiry tracking
Certificates don't expire suddenly. They expire silently — the document looks identical the day after it lapses. The fix is a rolling watch, not a better memory.
Why expiries slip through
Nobody re-checks two thousand spreadsheet rows every Monday. That's the whole story. Expiry dates were recorded correctly, filed correctly — and then time passed, quietly. Discovery happens at the worst possible moment: a worker turned away at the gate, a client audit sampling exactly the lapsed record, a contract renewal asking for proof.
The rolling windows
30 / 60 / 90 — what each window means
The method's power is that it's rolling: the dashboard is never "done", it's simply always current. The question changes from "did anyone check the sheet?" to "is anything in the red window?" — a question one glance answers.
Renewals are revenue, not admin
For a training provider, every expiring certificate is a rebooking waiting to be claimed — by you or by a competitor. Providers who remind client companies at 60 days don't just prevent compliance gaps; they capture the renewal course. Expiry tracking done well is a sales system wearing a compliance badge.
What this looks like in Sentinel
Sentinel's expiry dashboard watches every certificate across rolling 30/60/90-day windows, and renewal reminders go to the companies that need to rebook — triggered when you need them, from the same register that issued the certificates. Every action lands in the audit log. 9,000+ certificates run on this loop in production.
Know what expires before it expires
Rolling 30/60/90 windows, company reminders, audit log — one register doing the watching for you.
Book a demo →Common questions
What is 30/60/90 tracking?
A rolling dashboard of everything expiring in the next 30, 60 and 90 days — plan at 90, act at 60, escalate at 30.
Why do expiries slip through?
Because expiry is silent and spreadsheets don't watch themselves. Systems that alert continuously do.
Who should get the alerts?
Your team (capacity and course planning) and the client companies who need to rebook — Sentinel sends the latter automatically.
Practical guidance from the Sentinel team. Validity periods are set by your course categories and accreditation requirements — configure the windows to match yours.