---
schema_version: "1"
id: 23f487054e6f3061828f0a62012fef14656bf238c0fad197eee5d83e2d44fa4b
title: QueueableDuplicateSignature Class
collection: legacydeveloper
version: current
locale: en-us
portal_url: https://docs.salesforce.com/legacydeveloper/current/en-us/apexref/apex_class_System_QueueableDuplicateSignature.md
canonical_url: https://developer.salesforce.com/docs/atlas.en-us.apexref.meta/apexref/apex_class_System_QueueableDuplicateSignature.htm
source_site: developer.salesforce.com
content_type: documentation
content_hash: 8ab60c38363c667429440c38dd14131a7ea135f6be7d0596b67e5cd34e7d2c52
description: Used in the AsyncOptions class to store the queueable job signature in the DuplicateSignature property.Returns the duplicate signature as a string value.
---
# QueueableDuplicateSignature Class

Used in the AsyncOptions class to store the queueable job signature in the DuplicateSignature property.

## Namespace

[System](https://developer.salesforce.com/docs/atlas.en-us.apexref.meta/apexref/apex_namespace_System.htm "The System namespace provides classes and methods for core Apex functionality.")

- **[QueueableDuplicateSignature Methods](https://developer.salesforce.com/docs/atlas.en-us.apexref.meta/apexref/apex_class_System_QueueableDuplicateSignature.htm#apex_System_QueueableDuplicateSignature_methods)**

#### See Also

- [_Apex Developer Guide_: Detecting Duplicate Queueable Jobs](https://developer.salesforce.com/docs/atlas.en-us.264.0.apexcode.meta/apexcode/apex_dedupe_queueable.htm "Apex Developer Guide: Detecting Duplicate Queueable Jobs - HTML (New Window)")

## QueueableDuplicateSignature Methods

The following are methods for QueueableDuplicateSignature.

- **[toString()](https://developer.salesforce.com/docs/atlas.en-us.apexref.meta/apexref/apex_class_System_QueueableDuplicateSignature.htm#apex_System_QueueableDuplicateSignature_toString)**  
    Returns the duplicate signature as a string value.

### toString()

Returns the duplicate signature as a string value.

#### Signature

public String toString()

#### Return Value

Type: [String](https://developer.salesforce.com/docs/atlas.en-us.apexref.meta/apexref/apex_methods_system_string.htm#apex_methods_system_string "Contains methods for the String primitive data type.")