FACEBOOK CAPI EVENT DEDUPLICATION SETUP

Facebook CAPI Event Deduplication Setup

Eliminate duplicate Meta conversions when running pixel and CAPI together

event_id implementation in browser pixel and CAPI
Deduplication logic audit and diagnosis
Events Manager duplicate event identification
Fix for inflated conversion counts

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2–5 Days

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About This Service

What Is Facebook CAPI Event Deduplication Setup?

Running both the Facebook Pixel and CAPI simultaneously is best practice — but without proper deduplication, every conversion gets counted twice, inflating your reported results and confusing your campaign optimisation. We configure the event_id parameter consistently between your browser pixel and server-side CAPI calls, verify deduplication is working correctly in Meta Events Manager, and audit your existing setup to identify any events currently being double-counted.

Quick Facts

Delivery 2–5 business days

Pricing Fixed upfront quote

Access Needed GTM + relevant account

Support 30 days post-delivery

Certification Google-certified specialist

Output Written documentation

What You Get

Every Facebook CAPI Event Deduplication Setup Engagement Includes

event_id implementation in browser pixel and CAPI

Deduplication logic audit and diagnosis

Events Manager duplicate event identification

Fix for inflated conversion counts

Test event verification post-fix

Documentation of deduplication logic for your team

Our Process

How We Deliver Facebook CAPI Event Deduplication Setup

Audit & Review

We examine your existing setup, ad accounts, and analytics to understand exactly what needs to be built or fixed.

Scope & Price

You receive a clear, fixed-price quote with defined deliverables before any work begins. No surprises.

Build & Test

We implement and verify everything in GTM Preview mode, DebugView, or the relevant platform debugger before going live.

Deliver & Document

We launch, confirm all tracking fires correctly, and hand over full written documentation of everything built.

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Why Adslytics

The Difference a Specialist Makes

Google-Certified Specialists

Every project is handled by a Google-certified tracking specialist. Not an account manager. Not a junior contractor. The person on your project is the expert.

Fixed-Price, No Surprises

You see the exact price before work starts. We scope every project fully before quoting — so you know what you are getting and what it costs, with no ongoing meter running.

Full Written Documentation

Every delivery includes documentation of what was built, what triggers each event, and how to verify it. Your team can maintain it without coming back to us.

Direct Access to Your Specialist

You communicate directly with the person doing the work. No ticketing systems, no account managers relaying messages. Direct Slack or WhatsApp contact throughout.

Verified Reviews

What Clients Say

"After Apple's privacy changes our Meta campaigns were flying blind. The Conversions API setup restored our event match quality from poor to excellent and purchase reporting jumped from 40% to 92% of actual sales. Ad performance recovered fast."

Sophie Laurent

Paid Social Manager

"We had both the Meta Pixel and CAPI sending events but they were deduplicating incorrectly. The audit found the issue immediately and after the fix our event match quality score went from 4.2 to 8.7. Significant impact on campaign efficiency."

Ryan Kowalski

Performance Director

"Setting up server-side Meta CAPI for our Shopify Plus store through GTM was something we'd put off for months. The team got it done in two days, handled deduplication properly and the lift in our purchase data was immediate."

Aisha Okonkwo

Marketing Manager

FAQ

Frequently Asked Questions

Real answers to questions we hear from clients before starting a Facebook CAPI Event Deduplication Setup project.

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Meta uses the event_id parameter. When browser and server events arrive with the same event_id within a 48-hour window, Meta keeps only one and discards the duplicate.

Meta Events Manager shows a deduplication rate. If it's 0% but you're running both pixel and CAPI, something is wrong — either event_ids aren't matching or aren't being sent.

Sometimes. If the issue is only on the CAPI side, we can align event_ids there. But usually both sides need to share a consistent ID generation approach.

Duplicate conversions make your CPA look artificially low and your ROAS too high, which skews budget decisions. Fixing it gives you accurate data to optimise from.

Yes — deduplication works for all standard and custom events as long as event_id is implemented consistently.

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