First confirm the scope of the supplemental translation, signing requirements, and submission recipient, then verify that the translation matches the original document. Informal translations may be used internally, but formal submissions should use the required version and be signed by the agreed party.
In implementation, destination-country market-entry, tax, registration, and local procedures must still be rechecked under the latest requirements of competent authorities, licensed organizations, and applicable contractual provisions.
For the sequence for handling supplemental translations, see How to Avoid Customs Clearance Problems When Importing Cars.