What Evidence Manufacturers Require — A Complete Guide for Roll Forming Machine Warranty Claims

“Please provide more evidence.”

When submitting a warranty claim for a roll forming machine, one of the biggest frustrations buyers face is this:

“Please provide more evidence.”

Claims often stall — not because the defect is invalid — but because the manufacturer does not have sufficient proof to approve responsibility.

Overseas suppliers in particular require structured, technical documentation before:

• Approving replacement parts

• Dispatching engineers

• Covering freight

• Authorizing repairs

• Accepting liability

This guide explains:

• What manufacturers typically require

• Why they require it

• How to present it properly

• What causes claim rejection

• How to increase approval speed

In international machinery disputes, the strength of your evidence determines your leverage.

Why Manufacturers Require Detailed Evidence

Manufacturers must determine:

• Was the defect caused during production?

• Was the machine installed correctly?

• Was material within specification?

• Was the machine operated within rated limits?

• Did transport cause damage?

• Has unauthorized modification occurred?

Without evidence, they cannot distinguish between:

• Manufacturing fault

• Installation error

• Operator misuse

• Material deviation

• Freight damage

Evidence protects both parties — but it must be complete.

1. Machine Identification Details

Manufacturers will always request:

• Machine model number

• Serial number

• Contract reference

• Date of shipment

• FAT (Factory Acceptance Test) date

• SAT (Site Acceptance Test) date

• Warranty start date

If serial number missing, claim may not proceed.

Always include nameplate photos.

2. Detailed Fault Description

Manufacturers require precise, technical fault descriptions.

Not:

“Machine not working.”

But:

• Exact alarm code (verbatim)

• Operating speed at time of failure

• Material specification

• Section of machine affected

• Frequency of issue

Example:

Servo alarm F02 triggered at 32 m/min while running 0.5 mm G450 material. Alarm repeats after reset.

Precision speeds approval.

3. Photographic Evidence

Manufacturers expect:

• Wide view of machine section

• Close-up of failed component

• Measurement tool visible in image

• Serial plate confirmation

• Surrounding structure context

Photos should be:

• Clear

• Well-lit

• Taken before disassembly

Poor photo quality delays claim.

4. Video Evidence

For issues involving:

• Vibration

• Noise

• Punch misalignment

• Surface marking

• Panel distortion

• Hydraulic leakage

Video helps manufacturers:

• Observe real-time operation

• Confirm load condition

• Verify material feed

• Identify mechanical behavior

Video significantly reduces back-and-forth.

5. Measurement Documentation

Manufacturers often require actual measurement data.

For example:

• Shaft runout measured with dial indicator

• Cover width deviation measured with caliper

• Punch hole offset measured against drawing

• Hydraulic pressure reading at pump

Provide:

• Measured value

• Contract specification

• Tolerance allowed

Evidence must be quantitative, not subjective.

6. Material Specification Documentation

Many claims are rejected due to material issues.

Manufacturers may request:

• Thickness confirmation

• Yield strength

• Tensile strength

• Coating type

• Coil width

Mill Test Certificate (MTC) is highly recommended.

If material exceeds rated specification, warranty may be denied.

7. Installation & Commissioning Records

Manufacturers will often ask:

• Was installation supervised?

• Is leveling documented?

• Was machine anchored correctly?

• Was electrical supply verified?

• Was hydraulic oil type correct?

Provide:

• Commissioning checklist

• Electrical supply readings

• Leveling measurements

• Signed SAT report

Installation errors are one of the most common reasons for rejection.

8. Electrical Supply Verification

For electrical or servo failures, manufacturers may request:

• Voltage readings

• Phase balance

• Frequency

• Earthing confirmation

• Surge protection status

Unstable power supply often voids coverage.

Document power conditions clearly.

9. Timeline of Failure

Manufacturers will review:

• Date of installation

• Date of first operation

• Date of first fault

• Steps taken before reporting

• Date of warranty notification

Claims outside warranty period are often rejected automatically.

Timeline clarity matters.

10. Preservation of Failed Component

Manufacturers may require:

• Return of defective part

• Serial number verification

• Internal inspection

Do not discard failed components before authorization.

Physical evidence strengthens claim significantly.

Real Case Example

Buyer reported:

“Bearing failure at 8 months.”

Initial claim rejected due to:

• No installation leveling proof

• No shaft alignment measurement

• No photo evidence before disassembly

After resubmission with:

• Dial indicator readings

• Installation records

• Material spec confirmation

• Failure timeline

Warranty replacement approved.

Evidence quality changed outcome.

Second case:

Punch misalignment claim.

Buyer provided:

• Measurement photos

• Video under load

• Contract drawing reference

Manufacturer approved correction immediately.

Clear documentation accelerates resolution.

Why Incomplete Evidence Delays Claims

If documentation incomplete, manufacturer must:

• Request additional photos

• Ask for measurement clarification

• Confirm material specification

• Review internal engineering notes

Each request adds:

• 24–48 hours per cycle (especially overseas)

• Time zone delays

• Frustration

Strong initial submission prevents delay.

Common Evidence Mistakes Buyers Make

• Using vague language

• No serial number photo

• No measurement data

• Disassembling before documentation

• Not verifying material specification

• Failing to document electrical supply

• Emotional communication instead of technical

Avoid these errors.

How Evidence Supports Arbitration or Legal Action

If dispute escalates:

• Arbitration panel reviews documentation

• Legal teams analyze evidence

• Expert witnesses assess measurement records

Strong documentation:

• Improves credibility

• Reduces dispute duration

• Increases settlement likelihood

Poor documentation weakens legal standing.

Create a Standard Evidence Checklist

Every roll forming operation should maintain:

• Fault report template

• Photo documentation checklist

• Video recording procedure

• Measurement log sheet

• Installation archive

• Material certification file

Preparation reduces future conflict.

Frequently Asked Questions

What is the most important evidence?

Clear measurements and contract reference comparison.

Should I send video?

Yes — especially for mechanical and operational issues.

Is serial number required?

Always — it confirms machine identity and warranty eligibility.

Can warranty be rejected without documentation?

Yes — lack of evidence weakens claim.

Should I preserve failed parts?

Absolutely — physical inspection may be required.

Does better documentation speed approval?

Yes — strong evidence reduces back-and-forth communication.

Final Conclusion

Manufacturers require structured, measurable evidence before approving warranty claims.

Without it:

• Claims stall

• Responsibility becomes disputed

• Approval delayed

• Enforcement weakened

With:

• Serial confirmation

• Clear fault description

• Photos & video

• Measured tolerances

• Material documentation

• Installation verification

You dramatically increase approval speed and strengthen your legal position.

In overseas roll forming machine disputes, documentation is not optional — it is your strongest asset.

Before the next failure occurs, implement a formal evidence collection procedure.

Because in warranty disputes, the party with the best documentation usually wins.