Complaint Against the Issue of a VT20 An owner or presenter of a vehicle has the right to complain against the issue of a test certificate. Any complainant must be given a Notice of Appeal form (VT17) and told to send the completed form to the local VOSA Office or advised to telephone the VOSA Contact Centre.
VOSA will arrange for the vehicle to be re-examined if the alleged defects appear to call into question the test result providing there is a reasonable chance of assessing what the vehicle's condition had been at the time of test. It is not possible to make a blanket ruling on how long after the test such an assessment can be made.
It is, however, unlikely that mechanical defects can be assessed for complaints made more than 28 days after test or that corrosion defects can be assessed for complaints made more than 3 months after test. Any repairs made to the vehicle also make such an assessment less likely to be relevant.