Postback QA checklist

Postback QA checklist in brief

Use this checklist before launch, before a schema change, and before a major traffic increase. A postback setup is not ready when it merely “fires.” It is ready when IDs are stable, retries are safe, dedupe is deterministic, and rejection reasons are visible.

If two or more checklist sections fail, stop the rollout and fix the contract before you scale.

Who this is for

• Technical owners validating callback behavior.
• Ops teams preparing reconciliation and incident response.
• Publishers and advertisers who need proof that postback reporting is trustworthy.

Definition

A postback QA pass is a controlled validation of the full conversion event path:

• click identity,
• parameter mapping,
• endpoint acceptance,
• dedupe behavior,
• retry handling,
• and reporting visibility.

The goal is not just technical correctness. It is commercial trust under live traffic.

Decision table

How it works

Step 1: Validate required fields

Confirm the live or staging payload always includes:

• click_id
• transaction_id
• event status
• offer or campaign reference
• required sub fields for segmentation

Step 2: Test one valid conversion path

Run one clean test through the full stack and verify:

• the click is logged,
• the conversion event arrives,
• the postback is accepted,
• the same record is visible in reconciliation output.

Step 3: Test one failure path

Run at least one malformed or incomplete payload and confirm:

• it is rejected predictably,
• a machine-readable reason code is logged,
• no payout-side acceptance is created by accident.

Step 4: Test duplicate protection

Replay the same callback and confirm:

• only one valid acceptance survives,
• duplicate handling is logged,
• retry logic does not create false revenue.

Step 5: Test latency and recovery

Simulate delayed delivery or queue lag and verify:

• accepted events remain traceable,
• delayed events do not silently disappear,
• ops teams can tell the difference between late and lost.

Run this QA pass again after any schema change, endpoint change, retry-policy change, or new partner launch. Postback quality is not a one-time signoff; it is a release control that protects payout trust when traffic conditions change.

Example

A team validates a new offer launch with one clean conversion, one duplicate replay, and one malformed payload. The clean event is accepted, the duplicate is suppressed with a reason code, and the malformed callback is rejected without creating a payout-side artifact. That is a workable baseline for launch.

If the duplicate creates two accepted records or the malformed payload produces a generic error with no reason code, the rollout is not ready.

Common mistakes

1. Testing only the happy path Fix: always test one malformed and one duplicate path.

2. Ignoring retry behavior Fix: verify how the system behaves on repeated delivery.

3. No human-readable reason taxonomy Fix: map failures to stable codes before launch.

4. Assuming dashboards prove event integrity Fix: compare raw event logs and reconciliation output.

Checklist

• Required fields are present and named consistently.
• One valid callback completes the full path cleanly.
• One malformed callback fails with a clear reason code.
• Duplicate replay does not create duplicate acceptance.
• Retry behavior is bounded and visible.
• Delay handling distinguishes late from lost callbacks.
• Reconciliation output matches raw event intent.
• Incident owner and rollback condition are documented.

FAQ

Should this run only in staging?

No. Run it in staging first, then run a smaller live smoke check before scale and before major traffic ramps.

What is the minimum duplicate test?

Replay one exact callback and confirm only one accepted state survives with a logged duplicate outcome.

When should QA block launch?

When required IDs are unstable, duplicates are not suppressed, or failure reasons are not visible.

Is this only for technical teams?

No. Ops and commercial teams depend on the outcome because payout trust is part of launch quality.

Conversion link

Run this checklist alongside S2S postbacks explained, Postback URL parameters guide, and How to debug postback mismatches. If the QA pass is clean and you are ready to operationalize, continue to Platform.

Evidence notes

• Strategy source: docs/content-silo-plan.md and the synced Obsidian note dated 2026-06-18.
• This page is a checklist/template artifact and stays concise by design.