> For the complete documentation index, see [llms.txt](https://docs.favorlet.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.favorlet.io/english/favorlet/biz-guide/scanner.md).

# Holder verification with FAVORLET scanner

<figure><img src="/files/we2Gw0IacuR4Ook5v7XF" alt=""><figcaption></figcaption></figure>

## Verify off-line holder

If there is a situation where you need to immediately verify whether this person is our NFT holder or not offline, what do you do?

Simply checking images is not safe from scam issues. Quickly and easily verify the holder offline with FAVORLET Scanner!&#x20;

This page will guide you through how to **verify a holder of a specific NFT collection**.

{% hint style="warning" %}
FAVORLET does not currently support multi-token KIP-37 (ERC-1155).
{% endhint %}

\*\*Additional development is required to use features such as airdrop, check-in, etc.

{% embed url="<https://docs.favorlet.io/v/english/dev/scanner-api-guide>" %}

## 1. Install FAVORLET Scanner App &#x20;

▶ Android: <https://play.google.com/store/apps/details?id=io.fingerlabs.scanner>

▶ iOS:  <https://apps.apple.com/kr/app/favorlet-스캐너/id6443447080>

## 2. Set 6-digit passcode

![](/files/6krb2EXDm1yRIdafse30)

Set 6-digit passcode.

## 3. Set Scanner

![](/files/Qn4Hd3QTuKDXJJzpnnn9)

* service name \
  : Contents displayed at the top of the scan screen. (up to 20 characters)&#x20;
* Collection contract address \
  : Enter the contract address of the collection to be verified by the holder.&#x20;
* Service endpoint URL \
  : If you use the simple holder authentication function, please leave the corresponding field blank. Please note that scanning will not proceed normally if you enter an invalid url.

## 4. Scan

Scan FAVORLET verify QR code.

<figure><img src="/files/5NF1d8m59w7KqXJ2DbhK" alt=""><figcaption></figcaption></figure>

{% hint style="info" %}
FAVORLET authentication QR can be retrieved through FAVORLET > Main > Verification.

▶ Guide : <https://docs.favorlet.io/favorlet/guide/verification>
{% endhint %}

## 5. Confirm result

<figure><img src="/files/Bt4uTOMfzFM0VcL0RUt8" alt=""><figcaption></figcaption></figure>

You can verify the holder immediately after scanning.