Vendor accountability software

Proof your vendors did the work they billed

By the LockProof Team · Last updated July 19, 2026

Vendor accountability software usually means credentialing: certificates of insurance, contracts, compliance checkboxes. All of that tells you who your vendors are. None of it tells you whether they did the work they billed. LockProof covers that second half. Each vendor job at your properties comes back as a live photo with GPS and a sealed time, filed as a tamper-evident record by site and date. It is built for property managers, HOA and condo boards, and facility teams who pay outside vendors for work they rarely watch happen — and who want each invoice to arrive with proof attached.

How it works

Four steps. Nothing for the vendor to install, nothing for you to chase.

  1. Schedule the vendor job. The vendor gets a text with a link at the right time. No app, no login, no portal password to reset.
  2. The link opens the camera. Gallery uploads are blocked, so the photo is taken at your property, not pulled from a camera roll later.
  3. The capture is sealed. GPS is checked against your site, the server sets the time, and a SHA-256 fingerprint makes any later change detectable.
  4. The record files itself. Every vendor job lands on your dashboard, searchable by property, vendor, or date — ready the day an invoice, an owner, or a board asks.

What each verified vendor job carries

  • A live photo of the finished work, captured through the link with the gallery blocked
  • GPS recorded at capture, checked against your property
  • A server-set timestamp the vendor cannot change
  • A SHA-256 chain of custody on every record
  • Randomized timing, so a photo cannot be staged in advance
  • A dashboard that marks each job done, late, or missed
  • An Evidence Vault you can search by property, vendor, or date
  • A shareable signed proof link for an owner, a board, or an auditor
  • No vendor app and no login, in English and Spanish

Credentialing vs. proof of the work

Vendor management platforms answer a real question: is this vendor insured, contracted, and approved to be on site? That is worth knowing. It is a different question from whether Tuesday’s billed visit happened. Here is what each one actually gives you.

LockProofVendor management software
What it verifiesThe billed work itselfCredentials, contracts, insurance
When it helpsEvery job, as it happensBefore the vendor starts
Evidence per visitLive photo, GPS, sealed timeNone — visits are not its job
When an invoice is questionedShows the work was doneShows the vendor was approved
Tamper-evidenceSHA-256 chain of custodyNot applicable
Hand it to an owner or boardOne signed proof linkA compliance report

The two work together: your vendor management system decides who may work at your properties, and LockProof records what they actually did there. If a work order flows through a CMMS, the work order verification page covers that flow; for your own crews, see photo proof software for property managers. See what one finished record looks like in a sample verified record. And if a vendor invoice is ever disputed, the proof is already on file, dispute-ready.

Common questions

What is vendor accountability software?

Most tools under that name manage who your vendors are: certificates, contracts, compliance paperwork. LockProof covers the other half — whether the vendor actually did the work they billed. Each vendor visit comes back as a live photo with GPS and a sealed time, so an invoice arrives with proof attached, not just a claim.

Does LockProof replace my vendor management system?

No. Keep whatever you use for credentialing, insurance certificates, and contracts. LockProof adds the piece those systems do not have: evidence the billed work happened. It is not a compliance or bidding platform. It is the work-proof layer that sits alongside one, tied to each job at each property.

Do vendors need an app or a login?

No. The vendor taps a text link and the camera opens. Nothing to install, nothing to remember, and it works in English and Spanish. The link opens a live camera only, so the photo is taken at your property when the job is done, not uploaded from a gallery afterward.

Can a vendor fake or reuse a photo?

The link opens a live camera only, with gallery uploads blocked, so an old photo can't be attached. Timing is randomized, so a shot can't be staged in advance. Every submission carries GPS checked against your site, a server-set time the vendor cannot change, and a SHA-256 fingerprint that makes any later edit detectable.

How much does vendor accountability software cost?

LockProof is priced per site and confirmed on a short call. Essentials starts at $99 a month and Professional at $399 a month; Enterprise is custom. Your exact plan depends on how many sites and vendors you run. Book a demo and we will price it against your own portfolio.

See it on your own vendors

Book a 15-minute demo and watch a vendor job at one of your properties come back as a verified record: a live photo, the location, and a sealed time, filed before the invoice arrives.