Control the evidence.
Resolve the issues.
Defend the VAT.
MVD · Making VAT Defensible
VATTY is the pre-submission VAT evidence-control platform for accountants. However the invoice reaches you, by upload, a Company forwarding address, a connected client inbox or a secure link, VATTY assesses the evidence, identifies VAT at risk, manages the requests for anything missing and keeps your final decision recorded before the VAT Period is signed off.
Works alongside your existing accounting process. You retain final professional judgement on every decision.
The invoice you’re sent isn’t always a valid one
Clients and suppliers send whatever they have. A missing VAT number, a trading name that doesn’t match the registration, arithmetic that doesn’t add up, no customer address. Every one of those lands with you, and every one has to be dealt with before the VAT Period can be signed off.
What arrives is often incomplete
Documents turn up missing the details HMRC requires on a VAT invoice. No supplier VAT number, no customer address, totals that don’t reconcile, or a supplier name that doesn’t match the registration.
Putting it right takes real time
You request the corrected invoice, your client asks the supplier, and weeks later it arrives, if it arrives at all. The correspondence ends up in your inbox rather than with the transaction it relates to.
And the judgement is still yours
You’re the one who signs the VAT Period off. If a claim is ever questioned, you need to be able to show what was checked, what was asked for and why you reached the conclusion you did.
The ledger records the transaction.
VATTY controls the evidence behind it.
Your accounting software records the financial entry. VATTY sits before or alongside it, holding the evidence, the issues, the requests and the decisions that justify the VAT treatment. Nothing about how you file has to change.
Problems found during review
Evidence issues surface after the transactions have entered the accounts, when the deadline is close, the work has already been processed and there’s little time to go back to anyone.
Evidence controlled before sign-off
Documents are assessed as they arrive, VAT at risk is visible early, requests are tracked to an outcome, and your judgement is recorded before the VAT Period is signed off.
Making VAT review controlled, consistent and defensible.
From invoice capture, to a VAT Period you can defend
One connected workflow, so document checking, evidence requests, your judgement and VAT Period control all live in the same place.
Capture
Upload documents directly, forward them to the Company’s VATTY address, or connect your client’s inbox so supplier invoices are identified automatically.
Assess
VATTY checks document completeness, supplier VAT details, identity, arithmetic, VAT rates and other evidence indicators.
Prioritise
Evidence-backed VAT is separated from VAT at risk, so you can focus on the receipts that need your attention.
Resolve
Request corrected evidence or an explanation from the client or supplier, and track each request to an outcome.
Decide
Record the final Assessment, Treatment and reasoning, including any override or exception.
Sign off
Review the VAT Period, sign off with any exceptions recorded, and create the versioned Evidence Pack.
Bring VAT evidence in however it reaches you
VATTY handles both completed historical VAT Periods and ongoing collection through the quarter. Whichever route a document takes, it enters the same controlled workflow, so problems surface while there’s still time to put them right.
- Direct uploadAdd a single invoice, receipt or credit note, or bring in a whole completed VAT Period in bulk.
- Unique Company inboxEvery Company gets its own forwarding address, so anything sent there lands against the right client.
- Connected client inboxWith your client’s permission, VATTY finds supplier invoices in their mailbox and brings them in automatically.Only supplier invoices and their attachments are read. Your client can switch it off at any time.
- Secure evidence linksAsk a client or a supplier for a corrected invoice or an explanation. They reply through a secure link and it returns to the right receipt.
Set it up once. It runs for the whole period.
Every invoice, against HMRC’s requirements
VATTY assesses each document against HMRC’s published VAT invoice requirements and checks supplier VAT numbers using HMRC’s VAT number checking service. The checks applied depend on the document and invoice type.
Where required for the relevant invoice type, VATTY checks:
- Supplier name, address and VAT registration number
- Your client’s name and address as the customer
- A sequential number that uniquely identifies the document
- Time of supply and date of issue
- A description sufficient to identify what was supplied
- Quantity, unit price and VAT rate on each line
- Net, VAT and gross totals, and the arithmetic between them
- Total VAT chargeable expressed in sterling
- Reverse charge and margin scheme references where they apply
- Supplier VAT number verified against HMRC’s checking service
VATTY applies HMRC-aligned checks and uses HMRC's VAT number checking service. VATTY is not affiliated with or endorsed by HMRC and does not replace the accountant's professional judgement.
Every receipt keeps its complete evidence history
Each receipt brings together the original document, how it entered VATTY, the extracted details, the supplier checks, Assessment, Status, Treatment, identified issues and VAT at risk. Where further evidence is requested, the client or supplier response is added to the same record and the original stays retained. You then record the final professional decision.
GB 814 2207 49 · validChecked against HMRC's VAT number service£2,226.00 + £445.20 = £2,671.2020% · a recognised UK rateInvoice shows "Northgate Supplies Ltd"Registration holds "Northgate Holdings Ltd"One receipt record.
One audit history.
One source of truth.
Everything behind a VAT decision stays with the transaction it belongs to, from the original document and how it arrived, through to the reasoning you recorded.
See what is ready and what still needs action
Across every Company you manage, in one place. You can see where the exposure is concentrated long before the deadline, without losing the detail underneath it.
Portfolio
Evidence-backed VAT, VAT at risk, open evidence requests and approaching deadlines across every Company.
Company
The current VAT Period, recent receipts, action queue, evidence outcomes and sign-off position.
VAT Period
Reconcile receipts, unresolved issues, exceptions and VAT values before you sign the period off.
Evidence Pack
A versioned, immutable record of the evidence, your decisions and any exceptions, kept for review.
One invoice, from arrival to signed off
This is what happens when a single receipt arrives with something that needs looking at.
The invoice enters VATTY
The document is uploaded directly, forwarded to the Company inbox, identified through a connected client inbox, or included in a batch for a completed VAT Period. VATTY retains the original and creates the receipt record under the right Company.
Supplier identity requires review
The VAT number is valid and the arithmetic is correct, but the invoice is issued by Northgate Supplies Ltd while the registration is held by Northgate Holdings Ltd. Until that’s explained, the VAT isn’t supported.
The request goes out
VATTY prepares the evidence request for you to review and send. The corrected invoice or explanation comes back through Resolve and is stored with the original receipt record.
You record the final Assessment
The corrected evidence is assessed again. You review the result and record the final Assessment. The full decision history is then included when the VAT Period is signed off and the Evidence Pack is created.
No evidence issue is closed without a record, and every final decision stays traceable.
Six connected modules. One evidence-control system.
The six modules work together across the VATTY evidence-control workflow, from the first document check through to VAT Period sign-off.
VATTY Validate
Checks supplier VAT details, document structure, arithmetic, VAT rates, supplier identity and evidence completeness.
VATTY Evidence
Keeps the original document, replacement evidence, issues, correspondence, decisions and audit history together in one traceable receipt record.
VATTY Automate
Captures evidence through direct upload, batch upload, unique Company inboxes and connected client inboxes, and controls secure client and supplier requests, responses and follow-up.
VATTY Intelligence
Applies reusable VAT rules, treatment indicators, supplier patterns and risk prioritisation to support your review.
VATTY Database
Builds structured supplier records, VAT-registration details, trading-name relationships and historical decisions.
VATTY Control
Provides Portfolio, Company, VAT Period, Resolve, sign-off, exception management and Evidence Packs.
Better control across every VAT Period
Flexible evidence intake
Use upload, Company inboxes, connected client inboxes and secure links, without forcing every client into the same method.
Less repetitive review
Spend your time on the receipts that need professional judgement rather than reviewing every document the same way.
Problems surface earlier
Identify unsupported VAT during the VAT Period, while there’s still time to obtain corrected evidence.
Requests controlled in one place
Ask clients and suppliers for documents or explanations, track who needs to act, and keep the response with the receipt it relates to.
Practice-wide visibility
See which Companies are ready, which need action and where VAT at risk is concentrated.
A complete decision record
Keep the evidence, the correspondence and your reasoning together for every VAT Period.
What we’re building next
Everything described above is live today. These are the next pieces being built, and pilot practices help shape the order they arrive in.
Shared folder ingestion
Point VATTY at a client’s Drive or Dropbox folder and bring a whole period’s evidence in from where they already keep it.
Accounting integrations
Connect VATTY to the software you already use, so assessed transactions and their evidence status flow through without rekeying.
Product names and logos are the property of their respective owners. VATTY is not affiliated with or endorsed by any of them.
Start with three Companies and completed VAT Periods
Set up three real Companies and bring in one completed historical VAT Period for each. Add the documents in bulk, forward examples through the Company inbox, try automatic collection through a connected client inbox and gather corrected evidence through Resolve. Then compare VATTY’s Assessments, VAT at risk and Evidence Pack against your existing process.
Add the Companies
Create the Company records, VAT details, VAT Period dates, client contacts and unique forwarding addresses.
Import the evidence
Upload an existing collection of invoices and receipts in bulk rather than adding each document individually.
Test ongoing collection
Forward new examples to the Company inbox, connect a client inbox where appropriate, and use secure links to collect corrected evidence.
Compare the outcome
Review what VATTY identified, what moved through Resolve, and how the final Evidence Pack compares with your existing process.
See how VATTY makes VAT defensible
A walkthrough shows you a receipt being assessed, an evidence request going out and coming back, and a VAT Period being signed off with its Evidence Pack.