# Get issuer public key

Returns the issuer's public key for verifying the credit note signature. The device must be a valid recipient of this credit note to access the key.

Endpoint: GET /credit-note/{cheqiReceiptId}/issuer-key
Version: v1
Security: cheqi_oauth

## Path parameters:

  - `cheqiReceiptId` (string, required)
    Cheqi receipt ID of the credit note

## Header parameters:

  - `X-Device-ID` (string, required)
    Device ID requesting the issuer key

## Response 200 fields (*/*):

  - `publicKey` (string)

  - `keyAlgorithm` (string)
    Enum: "RSA_2048", "RSA_4096", "ECDSA_P256", "ECDSA_P384", "ED25519"

  - `keyCreatedAt` (string)

  - `issuerType` (string)

  - `issuerId` (string)

## Response 403 fields (*/*):

  - `publicKey` (string)

  - `keyAlgorithm` (string)
    Enum: "RSA_2048", "RSA_4096", "ECDSA_P256", "ECDSA_P384", "ED25519"

  - `keyCreatedAt` (string)

  - `issuerType` (string)

  - `issuerId` (string)

## Response 404 fields (*/*):

  - `publicKey` (string)

  - `keyAlgorithm` (string)
    Enum: "RSA_2048", "RSA_4096", "ECDSA_P256", "ECDSA_P384", "ED25519"

  - `keyCreatedAt` (string)

  - `issuerType` (string)

  - `issuerId` (string)