Upload bills, notices, and client statements. ShieldEngine™ organizes the issues, identifies the angles, and generates structured draft letters you can edit, sign, and send under your own name.
Free to start · No credit card required
Problems
Parsing disorganized documents, drafting from scratch, keeping language consistent across staff — these aren't skill problems. They're volume problems. ShieldEngine™ handles the analysis so you can focus on the work only you can do.
Blurry photos, partial statements, and out-of-order paperwork are the norm. Turning that into a usable letter takes time most practices don't have to spare.
When every letter depends on who drafted it that day, quality varies. ShieldEngine™ gives your team a consistent starting point for every dispute type, every time.
High-volume dispute work creates real exposure to missed deadlines, overlooked discrepancies, and issues that only surface when you cross-reference multiple documents. ShieldEngine™ flags what it finds so nothing obvious slips through.
Dispute letters that don't cite the right rules or agency expectations are easier to reject. ShieldEngine™ applies rules-based context to every draft so the language reflects current practice.
How it works
Bills, collection notices, credit reports, EOBs, insurance denials, policy documents, lease agreements, and prior correspondence. Photos, PDFs, and screenshots are all accepted.
The engine cross-references documents, identifies inconsistencies, missing disclosures, and procedural concerns, and surfaces context from applicable rules and billing patterns.
Select the type of letter you need — dispute, demand, appeal, complaint — and ShieldEngine™ produces a structured draft with the relevant findings already organized. Draft My Defense covers 16 letter categories.
Copy the draft into your own letterhead, CRM, DMS, or e-sign workflow. You review, refine, and sign. Documents are not stored after analysis is complete, and you remain the representative of record on every matter.
Documents are not stored after analysis · You stay the representative of record
What ShieldEngine™ checks
ShieldEngine™ surfaces flags and draft language for your review — not legal conclusions. You decide what to use.
Compares bills, statements, notices, and prior correspondence against each other to flag amounts, dates, or terms that don't line up.
Identifies line items, fees, and rate changes that lack clear disclosure or explanation, and flags them as candidates for dispute.
Notes where charges, denials, or collection activity appear inconsistent with the governing policy, contract, or published schedule of fees.
Flags timing concerns, missing required disclosures, and unclear rights notices that may support a procedural challenge.
Based on what's flagged, ShieldEngine™ suggests the most relevant dispute angles and generates draft language for each one.
For complex cases with multiple documents and multiple issues, ShieldEngine™ organizes findings by category so you can work through them methodically.
Outputs are informational and subject to your professional review
Who this is for
Draft My Defense is designed for professionals working on behalf of clients. Advanced consumers can also use it, but the tool and workflow are optimized for practice use.
High-volume dispute work requires speed and consistency. ShieldEngine™ gives attorneys and paralegals a structured starting point for every matter without replacing their judgment.
Credit report disputes, debt validation letters, and collection complaints require precise language and fast turnaround. ShieldEngine™ drafts; you finalize.
Whether you're challenging a utility shutoff, a medical billing error, or an improper lease charge, ShieldEngine™ helps you build the case document before you write the letter.
For operations handling billing disputes across large client volumes, Pro Business supports multiple staff, bulk document upload, and CSV export for case tracking.
Why professionals use ShieldEngine™
ShieldEngine™ is a drafting tool, not a decision-maker. You stay in control of everything that goes out under your name.
Every draft is a starting point for your review. ShieldEngine™ does not send letters, contact counterparties, or act on your behalf. The professional relationship between you and your client is yours.
Client documents are used only to generate the analysis and draft. They are not stored after the session ends.
ShieldEngine™ shows you what it found and why. You decide what to include in the final letter. Every flag includes reasoning, not just a label.
ShieldEngine™ outputs are plain text. Copy them into your letterhead, your CRM, your DMS, or your e-sign platform. No proprietary format lock-in.
ShieldEngine™ generates draft language based on document analysis. It does not provide legal advice, and all outputs should be reviewed by a qualified professional before use.
Plans for you and your team
Start free on a single dispute. Scale to full team volume when you're ready.
Results are informational only. The professional is responsible for reviewing and finalizing all letters before sending. No long-term contracts · Upgrade or downgrade anytime.
FAQ
Do I stay the attorney or representative of record on every dispute?
Can I use my own templates and letterhead with the drafts?
What types of documents can I upload?
Do you store my clients' documents or letters after analysis?
Can I use Warnvo outside the United States?
Are the draft letters considered legal advice?
Upload a client bill, notice, or statement and see how ShieldEngine™ helps you organize the issues and build your defense.
Free to start · No credit card required
16 letter categories
Draft My Defense gives you 16 structured dispute and demand types to choose from. Select the one that matches your client's situation and ShieldEngine™ organizes the relevant findings into a draft you can edit and send.
Each category is built around a specific dispute context. ShieldEngine™ surfaces the applicable angles and generates draft language — you review, refine, and sign.
For patients or advocates challenging itemized hospital or provider charges. ShieldEngine™ organizes duplicate charges, upcoded procedures, and unbundled services into a structured dispute letter.
For challenging a denied or underpaid insurance claim. ShieldEngine™ identifies the denial reason code, flags inconsistencies with policy terms, and drafts a citation-supported appeal letter.
For cases where the Explanation of Benefits doesn't match the provider bill or the patient's cost-sharing obligations. ShieldEngine™ cross-references both documents and drafts a dispute to the insurer or provider.
For requiring a debt collector to verify a debt before any payment is made. ShieldEngine™ drafts a compliant validation demand referencing applicable consumer protection rules.
For challenging inaccurate, outdated, or unverifiable items on a credit report. ShieldEngine™ organizes the disputed items and drafts letters to the credit bureaus and the furnishing creditor.
For documenting and challenging debt collection practices that may violate federal consumer protection rules. ShieldEngine™ flags the relevant conduct and drafts a complaint letter for the collector, regulator, or both.
For homeowners, property managers, or attorneys challenging charges beyond the agreed contract scope. ShieldEngine™ compares the invoice against the contract and drafts a demand for documentation or adjustment.
For challenging parts markups, unauthorized labor, or a final bill that significantly exceeded the written estimate. ShieldEngine™ flags the discrepancies and drafts a dispute letter to the shop or insurer.
For challenging undisclosed resort fees, dynamic currency conversion charges, or post-checkout additions to a hotel folio. ShieldEngine™ reviews the booking confirmation against the final bill and drafts a dispute letter.
For challenging rate misclassifications, unexplained fee adjustments, or estimated-read errors on electric, gas, or water bills. ShieldEngine™ organizes the findings and drafts a complaint to the utility or regulator.
For challenging undisclosed service charges, altered tip lines, or unauthorized items on a restaurant bill. ShieldEngine™ flags the relevant charges and drafts complaint or chargeback language.
For tenants or their advocates challenging illegal charges, improper security deposit withholding, or habitability violations. ShieldEngine™ organizes the facts and drafts a demand letter to the landlord or property manager.
For patients billed beyond what their insurance plan allows, including out-of-network charges that should be covered. ShieldEngine™ flags the billing against plan terms and drafts a dispute to the provider or insurer.
A general-purpose demand letter for situations where a business has failed to honor a disclosed policy, contract term, or legal obligation. ShieldEngine™ organizes the documented facts and drafts a formal demand.
For challenging a prior authorization denial, particularly where care has already been rendered or is medically necessary. ShieldEngine™ reviews the denial against applicable rules and drafts an appeal to the insurer or review board.
For cardholders or their representatives preparing documentation to support a credit card chargeback dispute. ShieldEngine™ organizes the billing evidence and drafts a summary letter for the card issuer.
ShieldEngine™ generates draft language for professional review. Outputs are informational only.