Slight error!

youre supposed to ring dvsa and let em know first but that's what they would probably tell you to do anyway.aint normally an issue unless someone kicks off about it but would send em an email explaining anyway assuming you can find one that anyone answers....done the same myself with no issues

I've done that myself, I usually add the failure by hand and sign it

That's not allowed, you can't write anything on official certs!

I believe the correct thing to do is to log the vehicle back on the system (vehicle still on the premises ) as a full test and add the missing RFR along with the rest of RFR and advisories , print the documentation , it might only take you short amount of time and may look like a very short test but you have a valid reason for that,the vehicle failed anyway in your case.
Dont think anyone should be adding written RFR or advisories on printed documentation

The sytem should allow an edit for a short while after
completion as you will always have human error in any system.
Unless you are a DVSA emolyee who as we all know never
make mistakes !!

Agreed, this is something I have put through on feedback a few times - A 5 minute cool down period would be enough.

Trade Engagement Manager - if you want to raise anything let me know and I will add.

just sent email...

Would also like to raise; The system comp2 should allow an edit for a short while, after completion of a test result, as you will always have human error in any system. A five minute cool down period would be enough.

As well; can DVSA start printing the Test number on the MOT inspection sheets? (You are required to record the test number, along with other info, for DSM tests where the machine won't read or produce a print out for low emissions). In addition to the colour and fuel type of the vehicle under test.

Patience is a virtue and they have to wait, & explain to the customer, 'nothing is perfect'?

I think they would need to introduce something so you couldn't print the cert off until the cool off period was over