Why an expired certificate stops transmission
eTIMS uses security credentials, sometimes described as a certificate or token, so KRA can trust that submissions come from your registered setup. Like any credential, these can have a validity period and need renewing. When one expires, your device can no longer authenticate, so invoices may fail to transmit even though everything else is correct.
The symptom often looks like a transmission or authentication failure, and the underlying cause is the expired credential. The fix is to renew or re-authenticate, which is a setup task rather than an invoicing one. Because the exact mechanism and steps depend on your eTIMS setup and can change, confirm the renewal process with KRA or your software provider rather than assuming.
Most eTIMS errors are not mysteries; they are a missing field, a sync gap or a wrong setting, each quick to fix.
How to fix it, step by step
Work through these in order. Stop when the issue clears.
- 1
Confirm it is a credential issue
An authentication or transmission failure that started suddenly, with no other change, often points to an expired credential.
- 2
Check your eTIMS setup for renewal
Look in your eTIMS configuration or provider tools for the credential status and a renew or re-authenticate option.
- 3
Renew or re-authenticate
Follow the renewal or re-authentication steps for your setup. Confirm the exact process with KRA or your provider.
- 4
Confirm transmissions resume
After renewing, issue a test invoice and confirm it transmits, then let any pending invoices clear.
How to stop it happening again
Treating it as an invoicing error
An expired credential is a setup issue, not a problem with the invoice. Renew the credential rather than editing invoices.
Ignoring expiry warnings
If your setup warns a credential is nearing expiry, renew it before it lapses to avoid an interruption.
Guessing the renewal steps
The mechanism depends on your setup. Confirm the renewal process with KRA or your provider rather than guessing.
A business renews and resumes
A business in Nairobi found invoices suddenly failing to transmit one morning, with nothing else changed. The cause was an expired eTIMS credential.
The owner found the renewal option in the setup, re-authenticated following the provider's steps, and issued a test invoice that transmitted cleanly.
With the credential renewed, the pending invoices cleared and normal transmission resumed, with no change needed to the invoices themselves.
Trading without eTIMS-compliant tax invoices risks KRA penalties, blocked VAT input claims for your customers, and receipts a business buyer cannot expense.
Veira signs every sale to KRA eTIMS automatically, so each receipt is compliant the moment it prints, with no separate device to reconcile.
How Veira avoids this
Veira is built so most eTIMS errors never reach you. It issues compliant KRA eTIMS invoices automatically with the right fields and tax treatment, validates as you go, captures the buyer PIN for business customers, and transmits to KRA, recording locally and syncing when you are offline so nothing gets stuck.
When something does need attention, Veira surfaces it clearly and local support helps you resolve it, rather than leaving you to decode a raw error. It runs on a free terminal or the phone you own, from KES 2,999 a month with a 30-day money-back guarantee. See how Veira works, or book a free demo.
Frequently asked questions
What does an expired eTIMS certificate mean?
How do I renew an expired eTIMS certificate?
Why did my invoices stop transmitting suddenly?
Can I prevent the certificate expiring unexpectedly?
Will Veira stop this error happening?
Where do I confirm KRA-specific details?
eTIMS certificate expired is usually a quick fix once you know the cause, and with a compliant system like Veira it rarely arises at all. See how Veira works, or book a free demo. Always read the exact error and confirm KRA-specific steps at kra.go.ke.