The same address, in two programs. Now you know.

Trace answers the audit question that gets sharper every funding cycle: is the same home drawing from two programs without anyone noticing. Load participant exports from the programs you run, and Trace normalizes the addresses and reports every overlap, exact matches and unit-level variants separately, inside one program and across programs. An overlap is presented as something worth review, never as a finding: the same address in two programs can be entirely legitimate.

Run an overlap check

What it does.

Normalizes addresses heuristically (suffixes, directions, punctuation, units) and says so plainly.
Finds every address appearing more than once, within a program and across programs, with the match basis stated.
Separates exact matches from unit-level variants, keeping the original spellings visible for review.
Sorts cross-program overlaps first, because those are the ones an auditor asks about.
Runs entirely in the browser. Participant addresses are never uploaded anywhere.

Who it is for.

Utilities and public program administrators

Answer the duplicate-claim question across program years and funding sources before an auditor asks it.

Funders co-funding alongside public programs

Check a private program's roll against the public programs serving the same counties.

Program auditors

Run the overlap pass on the exports you already collect, without shipping addresses to a vendor.

How it works.

Load the rolls

One export per program, or one file with a program column. Everything stays in the browser.

Read the overlaps

Every address appearing more than once, exact and unit-level matches separated, originals preserved.

Review the flagged few

Cross-program overlaps surface first. Each one is a review item with its records attached, not a verdict.

What it does, and what it deliberately does not.

Trace does	Trace does not
Surfaces address overlaps with the match basis stated	Does not accuse, decide, or treat an overlap as fraud
Normalizes addresses heuristically in the browser	Does not upload addresses or claim certified address validation

Trace does

Surfaces address overlaps with the match basis stated

Trace does not

Does not accuse, decide, or treat an overlap as fraud

Trace does

Normalizes addresses heuristically in the browser

Trace does not

Does not upload addresses or claim certified address validation

Availability.

The overlap check is live today as a public self-serve tool, no account required, nothing uploaded. Standing overlap monitoring across a funder's live programs is arranged with WattShed directly.

Run an overlap check Talk to WattShed

The rest of WattShed Verification

22 / VerifyEvidencePhoto evidence tied to an address and a measure, reviewed before anyone is paid.23 / VerifyLivenessCheck a photo's capture story before you rely on it.24 / VerifySignalFraud-risk signals on evidence photos, without touching location.26 / VerifyBaselineCheck what the event actually curtailed, before paying on it.27 / VerifyQueueEvery review lands with the right reviewer, in order.28 / VerifyTalkWhen the photos are not enough, put eyes on it live.

The other suites

01 / WattShed Design and PricingDesign a program and price every project inside it, on one published methodology.02 / WattShed ApplicationsOne application surface that enforces the program's rules and loses no one on the way in.03 / WattShed Field AssessmentEverything a field visit needs to know about one home, in the order the visit needs it.05 / WattShed OperationsRun a live program: budget, contractors, job costs, payments, and the systems you already use.06 / WattShed ReportingTurn program data into a number a regulator, a board, or a utility partner can trust.