Read the original ECU file correctly for file service

For an original-file request, the provider needs a clean chain of information: where the file came from, which tool read it, whether the vehicle was already modified, whether the customer supplied anything from a previous provider, and whether the file name belongs to the current vehicle. This is not about teaching a risky flashing process. It is about avoiding confusion before a professional file service provider reviews the case. A workshop should keep the untouched read separate from every later test file, rename copies carefully, and mention if a file was exported from an archive or from a customer email. If there is doubt about authenticity, the request should say unknown origin instead of original. That single sentence can prevent a provider from building an offer on the wrong assumption.

For archive hygiene, keep a note beside the file: internal job reference, read date, technician, reading route, battery support note if relevant, and whether the binary came from the current vehicle or from an archive. That operational memory makes the request stronger because the provider can distinguish a trustworthy untouched read from a loose file with no reliable story.