The GarageFolio Verification Standard
GarageFolio does not present every historical claim as equally certain.
The source and basis behind each record remain visible, allowing documented evidence to be distinguished from unsupported assertions.
One record.
Its source, supporting evidence and classification.
Event
Engine Overhaul
Date
12 May 2022
Mileage
79,919 mi
Service Provider
Stuttgart Motors
Source
Owner Provided
Who provided it
Evidence
Service Provider Invoice
What supports it
GF Documented
GarageFolio
How it was classified
Supporting Material
Service Provider Invoice
Pages 1 of 1 · Redacted for privacy
Stuttgart Motors · INVOICE · 12 May 2022
Who supplied it
Identifies the origin of the information.
What supports it
Shows the evidence behind the claim.
How it is classified
Indicates how GarageFolio evaluated the entry.
Three Levels of Attribution
Not every historical claim carries the same weight.
GarageFolio makes the basis behind each entry visible, distinguishing source-confirmed activity, documented history, and owner-reported information.
GF VERIFIED
GF Verified
Confirmed directly by the organization responsible for the activity.
EVENT
Brake Fluid Service
DATE
04 Apr 2024
MILEAGE
81,204 mi
SERVICE PROVIDER
Classic Performance Center
SOURCE
Facility Submitted
EVIDENCE
Facility Work Order
Classic Performance Center
Automotive Service & Restoration
WORK ORDER
WO-88421
Date: 04 Apr 2024
Work Order For
Description
Amount
Brake Fluid Service
$295.00
GF DOCUMENTED
GF Documented
Supported by available evidence assessed within the broader provenance record.
EVENT
Engine Overhaul
DATE
12 May 2022
MILEAGE
79,919 mi
SERVICE PROVIDER
Stuttgart Motors
SOURCE
Owner Provided
EVIDENCE
Service Provider Invoice
Stuttgart
European Motor Works
INVOICE
INV-4527
Date: 12 May 2022
Work Order For
Description
Amount
Engine Overhaul -- Complete
--
OWNER-REPORTED
Owner-Reported
Preserved as supplied by an owner, with its source clearly identified.
EVENT
Original Tool Kit Included
DATE
Recorded 18 Jun 2026
SOURCE
Current Owner
EVIDENCE
No independent evidence attached
NOTE
Preserved as part of the vehicle's story
Owner Note
18 Jun 2026
Original tool kit included with vehicle at time of sale. Kept with the car since new.
Every record preserves both the claim and the basis behind it.
Where the Factory Fits
The factory certifies the car's birth.
GarageFolio keeps the record of its life.
A Red Book, Certificate of Authenticity or Classic Center data card is the authoritative record of what a vehicle was when it was built. GarageFolio does not second-guess or duplicate it. The document, its scope and its date of issue become part of the vehicle's continuing provenance record.
Factory-issued document
Authority on original specification
1980
First Ownership
Documented ownership transfer
1994
Service
Dealer service invoice
2008
Restoration
Restoration photos and notes
2016
Storage
Climate-controlled storage record
2022
Engine Overhaul
Engine overhaul
invoice and
details
Today
Current Stewardship
Ongoing care and maintenance
1980
First Ownership
Documented ownership transfer
1994
Service
Dealer service invoice
2008
Restoration
Restoration photos and notes
2016
Storage
Climate-controlled storage record
2022
Engine Overhaul
Engine overhaul
invoice and
details
Today
Current Stewardship
Ongoing care and maintenance
The factory establishes the authenticity. GarageFolio preserves and connects everything that follows.
What The Standard Does Not Claim
The record is evaluated.
The vehicle is not certified.
The GarageFolio Verification Standard evaluates the provenance of records. It does not appraise the vehicle, inspect its mechanical condition or certify its authenticity.
Gaps remain gaps.
Where the historical record is incomplete, GarageFolio does not infer what happened or fill the missing years with assumptions.
PROVENANCE RECORD
1980 Porsche 911 SC — Werk Nr. 9800001234
1980
1994
HISTORY GAP
No event inferred
2008
2022
Today
Gaps remain visible rather than being reconstructed.
No Appraisal
GarageFolio does not assess the market value or condition grade of the vehicle.
No Inspection
The vehicle is not physically examined, test-driven, or mechanically evaluated.
No Authenticity Certificate
GarageFolio issues no certificate of authenticity for the vehicle itself.
The Standard Behind It
A standard designed
to withstand scrutiny.
Every rule governing attribution, evidence and record classification is documented in the GarageFolio Verification Standard. The standard is version controlled and currently undergoing external review by judges, restorers and marque specialists before public release.
The complete standard will be published when the current review process concludes.