Home/Solutions/Fraud Prevention & Pre-Screening
DATA QUALITY & INCIDENCE RATE SHIELD

Filter Out Fraud and Disqualifications Before They Touch the Survey.

When routing traffic across commercial panel suppliers and internal direct lists, unvetted sample ruins study incidence rates and fills datasets with bot traffic, VPN spoofing, and demographic screenouts. VioraBridge screens respondents upstream at the routing gateway. Block automated bots with silent honeypots, verify respondent geolocations with timezone checks, qualify participants with custom pre-screeners, and balance traffic with weighted link rotation before entering the survey.

Get Started FreeExplore Multi-Vendor Hub
UPSTREAM FILTERING ARCHITECTURE

Why Screen at the Gateway Instead of Inside the Survey.

Screening inside client survey software causes two major operational problems:

In-Survey Screening Problem
Disqualified respondents and bots register as partial starts in your client survey account, inflating drop-off statistics and consuming response volume allowances.
VioraBridge Upstream Solution
Unqualified traffic and bots are stopped at the gateway. Only verified, qualified respondents ever reach the survey URL, keeping client data clean and incidence rates high.

Disqualified participants route straight to their vendor terminate postback without dropping tracking parameters, or land on your branded screenout screen in Native Hosted Mode for direct recruits. Your client survey only sees verified human completes.

MULTI-STAGE SECURITY ENGINE

Four Layers of Upstream Protection Before Survey Inflow.

Every respondent entering through VioraBridge passes through automated security filters before touching client survey software:

LAYER 1: BOT DEFENSE
Silent Honeypot Traps
Invisible form fields catch automated scrapers and bots that auto-fill inputs. Flagged traffic is stopped instantly with an isolated quality status.
LAYER 2: GEO INTEGRITY
Timezone & Geo-Fence Guard
Cross-references browser timezone against project target countries. Identifies foreign proxies pretending to be domestic respondents.
LAYER 3: DUPLICATION
IP Deduplication & Subnet Blocks
Prevents duplicate survey entries from the same IP address or subnet clusters across all connected sample vendors.
LAYER 4: QUALIFICATION
Demographic Pre-Screeners
Qualify age, country, employment, industry, or custom screening questions before allowing entry into the client survey.

If a participant fails any security or demographic gate, VioraBridge executes their return outcome immediately. Vendor postbacks restore cleanly without ID loss, and your client survey remains unpolluted.

CUSTOM DEMOGRAPHIC SCREENING

Qualify Participants on Your Terms Before Routing.

Set up pre-screening questions directly in the project dashboard. Configure standard demographics or custom qualification criteria:

LIVE PRE-SCREENER EVALUATION WORKFLOW
PRE-SCREENER GATE
Target Criteria
• Country: US, CA
• Age: 25-54
• Employment: Full-Time C-Level
CRITERIA FAILED
Fires vendor terminate postback (or hosted screenout). Client survey never sees participant.
CRITERIA MET
Passes into client survey with parameters intact. High study incidence rate maintained.

Screener responses can be logged for auditing or passed as parameters directly into your client survey tool.

TRAFFIC DISTRIBUTION

Weighted Link Rotation Across Multiple Survey Links.

When studies require split testing, language rotation, or multiple survey cells, VioraBridge distributes qualified participants across links automatically using percentage weighting:

A/B Questionnaire Testing

Split incoming qualified traffic evenly (50/50) or by custom ratio across different survey versions to test questionnaire length and response quality.

Multi-Cell Sample Routing

Distribute sample across regional links or language variants without requiring your suppliers to manage multiple project codes.

Real-Time Weight Adjustments

Adjust link allocation percentages live as quotas fill, without pausing fieldwork or issuing new vendor links.

SOURCE-LEVEL SECURITY PROFILES

Tune Security by Source. Never Block Real Participants.

When combining commercial panel suppliers with internal employee lists or customer panels, a blanket security policy creates false positives on corporate networks and lets fraud through on open exchanges. VioraBridge provides granular toggles per source:

Open Panel & Exchange Profile
Enforce strict honeypots, aggressive datacenter IP blocks, timezone mismatch rejections, and strict fingerprint deduplication.
Internal Employee & Customer Profile
Relax VPN and datacenter checks so employees on corporate networks or mobile VPNs are not blocked by accident, while maintaining basic bot defenses.
MASTER ROUTING GATEWAY

Multi-Vendor Survey Routing Software

Connect unlimited commercial sample suppliers into client surveys with automated parameter restitution and atomic quota safe-caps.

View Multi-Vendor Routing Solution →
PROPRIETARY SAMPLE

Internal Panel & Direct List Routing

Generate 1-click mail merge links, host custom branded exit screens, and collect honorarium details on verified completes.

Explore Internal Panel Routing →
CONCURRENCY CONTROL

Atomic Pre-Survey Quota Safe-Caps

Eliminate overquota cost leaks from rapid sample blasts. Lock quotas at the gateway the millisecond targets are reached.

Inspect Quota Safe-Caps →
BRAND CONFIDENTIALITY

Whitelabel Link Masking & Portals

Protect client survey links under your custom CNAME domain and share password-protected fieldwork progress portals.

Discover Whitelabel Masking →
FINANCIAL LEDGER

Vendor Reconciliation & Invoicing

Automate complete dispatches, resolve vendor dispute sheets with timestamped audit logs, and manage project AP/AR margins.

Read Reconciliation Guide →
NEXT IN FIELDWORK SOLUTIONS

Pre-Survey Atomic Quota Safe-Caps

How upstream atomic quota safe-caps eliminate overquota cost leaks and lock sample vendor traffic the millisecond target completes are reached.

Read Solution →
COMPLETE RES-TECH INFRASTRUCTURE

Explore the Full VioraBridge Operations Suite

Every tool connects directly into your existing survey platforms. Predictable software licensing: $5,000/year includes 10,000 completes, with custom volume tiers for enterprise scale.

SOLUTION 1 • MASTER ROUTING

Multi-Vendor Survey Routing

Route unlimited sample vendors into Qualtrics, Decipher, and Forsta with automated parameter mapping and atomic quota protection.

Read Solution →
SOLUTION 2 • PROPRIETARY SAMPLE

Internal Panels & Direct Lists

Generate 1-click mail merge links, host custom branded exit screens, and collect honorarium details on verified completes.

Read Solution →
SOLUTION 4 • FAST QUOTA MATCHING

Upstream Quota Pre-Screening & Safe-Caps

Pre-screen for open quotas in seconds so respondents never answer 15 questions only to hit a dead-end overquota screen.

Read Solution →
SOLUTION 5 • BRAND PRIVACY

Whitelabel Link Masking & Portals

Mask survey links under custom CNAME subdomains and share password-protected progress portals with vendor buy rates redacted.

Read Solution →
SOLUTION 6 • FINANCIAL LEDGER

Vendor Reconciliation & Invoicing

Automate complete dispatches, resolve vendor dispute sheets with timestamped audit logs, and manage project AP/AR margins.

Read Solution →
SOLUTION 7 • UPSTREAM SCREENER

Pre-Survey Screener Gate & Routing

Pre-screen respondents on your custom domain, log answers in real time, and route qualifying audiences to target-specific survey URLs.

Read Solution →

Fieldwork Infrastructure Built for Real Operations.

Screen demographics, block fraudulent bots, and protect client survey incidence rates from a centralized routing layer.

Get Started FreeExplore Multi-Vendor Hub