I paid but the course is still locked.

Refresh the course page. Access is granted the moment the payment is confirmed; if it is still locked after a minute, email us with the email address you used.

How do I verify a certificate?

Open the verification page and paste the certificate ID or scan the QR code printed on the certificate.

Does my certificate expire?

No. Certificates do not expire and there is no renewal fee. The verification link and QR code stay live for as long as we operate the platform.

Email us within 14 days of purchase, as long as you have not already passed the final assessment and received a certificate. We refund to the original payment method.

Support

We're here to help

Most questions are answered below. If yours isn't, write to andrew@leanengineering.io and include the email address on your account — we reply within one business day.

I didn't get the verification email.: Check spam and promotions. You can resend it from the sign-in prompt shown when you open the course. If it still doesn't arrive, email us and we'll confirm the account manually.
I paid but the course is still locked.: Refresh the course page — access is granted the moment the payment is confirmed. If it is still locked after a minute, email us with the address you used at checkout.
Can I change the name on my certificate?: Yes, at any time. Update your full name on the Account page — an already-issued certificate is reprinted with the corrected name and its verification link stays the same.
I forgot my password.: Use “Forgot password” on the sign-in page. We'll email a link that lets you set a new one. If you signed in with Google, keep using Google.
Can I retake the final exam?: Yes, as many times as you need. Each attempt is recorded on your account and the questions are reshuffled. There is no timer and no extra charge.
Does my certificate expire?: No. Certificates do not expire and there is no renewal fee. The verification link and QR code stay live for as long as we operate the platform.
Can I get a refund?: Yes — email us within 14 days of purchase, as long as you have not already passed the final assessment and received a certificate. We refund to the original payment method.
How does an employer verify my certificate?: Every certificate has a public verification link and QR code. Anyone can open it to confirm the recipient name, course and issue date — nothing else is shown.
Can I use this on my phone, and does it work offline?: The course is built for the phone browser — text, audio and quizzes all work on mobile. It needs an internet connection; there is no offline download yet.
How do I delete my account and data?: Open the Account page and use “Delete account” — it removes your account, progress and certificate immediately. Deleting the account also removes the certificate record, so its verification link will stop resolving — download or print your certificate first.

What this course does not include

So there are no surprises after you pay, here is what is deliberately outside the current course.

State licensure or CEU accreditation — this is a completion certificate, not a regulated credential.
Team or multi-seat purchasing, and employer dashboards for tracking staff.
Additional age bands beyond the 0–24 month course.
A native iOS or Android app, or offline lesson downloads.
Printed certificates posted to you — certificates are digital, printable from your account.

If you need any of these for your setting, email us before you buy and we will tell you honestly whether we can help yet.

Verify a certificate →Refunds & terms →