Before/After Photos for Field Service Technicians

Installers and repair technicians need before/after photos to show the condition on arrival, the work done and the result on departure. Those photos are also the backbone of any warranty claim, especially the shot of the rating plate with the serial number. This guide gives concrete checklists for air conditioning, electrical and telecom installs, and shows how to organise photos so you can still find them a year later.

Why before/after photos matter in field service

A warranty call usually comes weeks or months after the install. The questions are always the same: how was the unit mounted, how was the pipe run, which breaker was fitted, who did it and when. Without photos, the technician only has memory.

Before/after photos help you:

Prove the starting condition: the wall was already cracked, the socket was already scorched.
Prove workmanship: insulation sealed, cables neatly routed, earth connected.
Meet warranty requirements from manufacturers or distributors, which commonly ask for a nameplate photo and a photo of the failed part.
Avoid arguments about who caused a stain, a drill hole or a fault.

The general rule: before, during, after

Splitting photos into three stages keeps the record readable:

Before: a wide shot of the work area, close-ups of existing damage, the nameplate of the old unit if you are replacing it.
During: anything that will be hidden once finished (pipes in the wall, joints, cables inside trunking) and the failed part you just removed.
After: the finished job, close-ups of the critical points, gauges or readings during the test run, and the cleaned-up area.

“During” photos are the ones people skip, yet they are the most valuable: once the wall is plastered or the trunking closed, nobody can see inside again.

Checklist by job type

Job	Required photos	Nice to have
AC installation	Indoor and outdoor unit nameplates (model, serial), outdoor unit position, pipe run	Gas pressure at test run, condensate drain, brackets
AC repair	Nameplate, failed part, replacement part	Supply air temperature before/after
Residential electrical	Distribution board before/after, breaker ratings, earth wire	Meter readings, circuit labels applied
Telecom install	Customer device (serial/MAC), termination point, cable route	Speed test result, cable fixings
Water heater, water purifier	Nameplate, inlet/outlet, electrical connection	Water pressure, RCD fitted
CCTV	Mounting position, recorder label, camera view on screen	Power supply, weatherproofed connectors

Getting a readable nameplate

The nameplate is the photo most often ruined: it is small, reflective and usually in an awkward spot.

Wipe dust off the label first.
Shoot straight on and avoid flash bouncing off glossy labels.
Check on the spot: zoom in and confirm you can read every character.
Take one wider shot so it is clear which unit the label belongs to (indoor or outdoor).
Copy the serial into the handover form, matched to each unit.

Warranty claims: prepare on install day

Warranty requirements differ by brand, so always read the policy of the manufacturer or distributor you work with. A typical claim still needs:

A nameplate photo with model and serial readable.
Before/after photos of the repaired component.
A photo of the failed part, and the part itself kept until the manufacturer confirms it does not need to be returned.
Install date, failure date and repair date that line up with the photos.
A form signed by the customer.

When photos carry trustworthy time and location, showing “this unit was installed at this address on this date” becomes much easier. The same thinking applies to construction inspection photo checklists.

Organising photos so you can find them in 12 months

A technician can take hundreds of photos a week. If they all sit in the phone’s gallery, nobody will find the right one when a claim arrives. A few habits:

One major customer or contract = one project, each recurring address = one site.
Put the job ticket number in the note of every photo.
Use consistent prefixes: “Before”, “During”, “After” at the start of the note.
Do not leave photos only on personal phones: when a technician leaves, the photos leave too.

More on this in organising field photos by project.

How SnapID Mark helps technicians

SnapID Mark stamps each photo with trusted time synced with the server, date, weather, GPS coordinates with accuracy, address, a mini map, a SnapID code and a QR code. For field service teams:

Notes and signature on the stamp: add the job ticket number, a “Before/After” note or a signature to the stamp template. See stamp templates.
A required company template: lock a template with your logo and service hotline so every photo sent to customers looks consistent.
Customers and manufacturers verify on their own: scan the QR or enter the code on the verify page, no account needed. If someone receives a copy of the photo, they can compare its SHA-256 fingerprint with the original right in their own browser. See detecting edited photos with SHA-256.
Dead zones are fine: basements, plant rooms and telecom sites with no signal still get trusted time and a code; the photo uploads later.
Projects, sites and reports: photo map and PDF or Excel exports from the web dashboard. See business features.
Photo clock-in at sites: useful when crews work at fixed locations with a geofence.

To be clear about limits: SnapID Mark does not read serial numbers from photos and does not connect to manufacturers’ warranty systems. You still type the serial into your form.

Common mistakes

Skipping “during” photos, then having no idea how a joint was made when it leaks.
Glare on the nameplate, so the serial is unreadable.
Only close-ups, no wide shot, so nobody knows which unit a photo shows.
Photos scattered across several people’s personal phones.
Throwing away the failed part before the manufacturer confirms.

FAQ

Do small repairs really need photos?

At least one before and one after, plus the nameplate if the unit is under warranty. It adds a few seconds per job.

What if the customer does not want photos taken inside their home?

Explain that you only photograph the equipment and work area, never people or personal items. If they still decline, note it on the job form.

Can timestamped photos replace a signed completion form?

No. Photos are supporting evidence; a form signed by the customer is still needed.

How can a customer trust that a photo was not edited?

Send the SnapID code or QR so they can open the verify page and compare the file with the original.

If your team wants a clean before/after record for every job ticket, download SnapID Mark and try it with the free personal workspace.