---
title: id
framework: proximityreader
role: symbol
role_heading: Instance Property
path: proximityreader/vasrequest/merchant/id
---

# id

A unique identifier for the merchant.

## Declaration

```swift
let id: String
```

## Discussion

Discussion When reading a card, the system sends this identifier to the customer device, which uses the value to retrieve the matching loyalty or reward ID of the customer.