# Conversions and postback

> Generate your postback token, paste the URL in your tracker, send lead, purchase and rebill events, and test the URL without recording anything.

URL: https://lananetwork.com/guide/conversions
Markdown: https://lananetwork.com/guide/conversions.md
Updated: 2026-11-05

## How conversions reach us

Conversions are reported server to server. When a visitor reaches your landing page, our click id is in the URL (the `{click_id}` macro, usually as `ocid`). Your tracker keeps it, and when the visitor converts it calls our postback URL with that id. No pixel on your pages.

## Set it up

1. Make sure your landing URL template carries `ocid={click_id}` (see [Create your first campaign](https://lananetwork.com/guide/create-your-first-campaign)).
2. Open Postback, card Your token, and click Generate. The token is shown ONCE, with three postback URLs ready to paste: lead, purchase and purchase_recurring. Copy them now: we only keep a fingerprint.
3. Paste the URLs in your tracker or offer platform, mapping `click_id` to the value it captured from `ocid`, and `payout` to the amount.
4. Paste one URL, as saved in your tracker, in Check URL. We tell you what is missing and send one test request with a placeholder click id: nothing is recorded or billed.

The [Developers](https://lananetwork.com/developers) page has ready-made settings for Voluum, Keitaro, Binom, RedTrack and any S2S tracker.

## Parameters

- `token` (required): your secret postback token.
- `click_id` (required): the value we sent in `ocid={click_id}`, 35 characters.
- `event` (required): `lead`, `purchase` or `purchase_recurring` (each rebill).
- `payout` (optional): amount in USD, dot as decimal separator, for example 49.99. Used for your revenue and ROAS.
- `tx` (optional): your transaction id, letters, digits, dot, underscore or hyphen, 64 characters at most. With it, each rebill is unique per click.

A lead and a purchase count once per click. Without `tx`, a rebill with the same amount on the same click within 60 minutes is treated as a retry.

## Answers you can get

- `OK`: conversion recorded. `OK: duplicate`: already recorded.
- `ERROR: unknown click_id`: no click with this id on your campaigns. Do not retry.
- `ERROR: click expired`: the click is older than 90 days. Do not retry.
- `ERROR: bad request` (400): a parameter is missing or malformed.
- `ERROR: bad token` (401): check or regenerate the token.
- `ERROR: retry` (503): a temporary problem on our side. Retry later.

## If something goes wrong

- Bad token: the token works only once your account is approved. If it is, regenerate it: the old one stops working at once, so update every URL in your tracker.
- Unknown click_id on real conversions: your tracker is not passing the `ocid` value, or the click came from another network. Compare one click id with your landing URL.
- Lost the token: generate a new one; we cannot show the old one again.

## Frequently asked questions

### Does Check URL create a fake conversion?

No. It sends one request with a placeholder click id: nothing is recorded or billed.

### How do I report rebills?

Send event=purchase_recurring for each rebill, ideally with your transaction id in tx so each one is unique.

### Who can generate the token?

An owner of the advertiser account.

### How long after the click can I send a conversion?

Up to 90 days. After that the postback answers ERROR: click expired, and retrying does not help.