--- title: Using Dynamic Fields as Identifiers for Registrations in the Trainer Module description: Learn how to use dynamic fields as identifiers in the Trainer Module to match pre-registered participants with form submissions and automatically update missing data. --- [Skip to content](https://help.virtualbadge.io/article/using-dynamic-fields-as-identifiers-for-registrations-in-the-trainer-module-#main-content) - [English](https://help.virtualbadge.io/article/using-dynamic-fields-as-identifiers-for-registrations-in-the-trainer-module-) - [Deutsch](https://help.virtualbadge.io/de/article/verwendung-dynamischer-felder-als-kennungen-für-anmeldungen-im-trainer-modul) English Show submenu for translations [Contact Support](https://help.virtualbadge.io/article/kb-tickets/new?hsLang=en) [![Virtualbadge.io White-2](https://help.virtualbadge.io/hs-fs/hubfs/logo/Virtualbadge.io%20White-2.png?width=300&height=40&name=Virtualbadge.io%20White-2.png)](https://www.virtualbadge.io/) Open main navigation Close main navigation - - [English](https://help.virtualbadge.io/article/using-dynamic-fields-as-identifiers-for-registrations-in-the-trainer-module-) - [Deutsch](https://help.virtualbadge.io/de/article/verwendung-dynamischer-felder-als-kennungen-für-anmeldungen-im-trainer-modul) English Show submenu for translations - [Contact Support](https://help.virtualbadge.io/article/kb-tickets/new) - [Go to Admin Dashboard](https://admin.virtualbadge.io/) [Go to Admin Dashboard](https://admin.virtualbadge.io/) Hello! How can we help you? - There are no suggestions because the search field is empty. 1. [Help Articles Virtualbadge.io](https://help.virtualbadge.io/article?hsLang=en) 2. [Trainer Module](https://help.virtualbadge.io/article/trainer-module?hsLang=en) 3. [Trainer module settings](https://help.virtualbadge.io/article/trainer-module?hsLang=en#trainer-module-settings) # Using Dynamic Fields as Identifiers for Registrations in the Trainer Module ## Use custom fields to match pre-registered participants and complete missing data during form submission This feature is useful when you **pre-upload participant registrations for a training** before it takes place, but not all required information is collected at that stage. In many cases, you may only have **partial data (e.g. name and email)** during registration. Additional details can then be collected later when participants **scan a QR code and complete a form during or after the training**. To ensure that the newly submitted information is correctly linked to the existing participant record, Virtualbadge.io uses an **identifier field**. This field allows the system to **match the pre-uploaded participant with their form submission** and update the missing information accordingly. If you’d like to learn more about how registrations work in general, click [here](https://help.virtualbadge.io/article/pre-uploading-registration-lists-for-trainings?hsLang=en). --- ### Default Identifier (Name & Email) By default, Virtualbadge.io uses **name and email** as the identifier to check whether a participant is already registered. This means: - When a participant submits the form via QR code - Their name and email are matched with an existing record - Any additional data they provide is added to their existing entry --- ### Using a Custom Identifier Field In some cases, trainers or administrators may prefer to use a **different identifier**, such as: - Personal ID - Employee ID - Membership number - Any custom dynamic field Virtualbadge.io allows you to **define a custom dynamic field as the identifier**, instead of relying on name and email. This is especially useful when: - Names may be duplicated - Email addresses are not reliable or are not collected - A unique internal ID is preferred --- #### Important Note: Before participants use the QR code or form link, they must already be **uploaded to the system using the selected identifier field**. This ensures that when they submit the form, the system can correctly **match and update their existing record**. --- ### How to Enable Custom Identifier Fields #### Step 1: Enable the feature 1. Go to **Settings → Trainer Module** 2. Locate **Registration Identification Field** 3. Click on **Manage** 4. Then, **activate the identification field** as required. This will activate the feature for all new trainings. --- #### Step 2: Configure the identifier for a training 1. Navigate to your training 2. In the **Training Details** section, scroll to **Predefined Recipient Information & Recipient Identification** 3. Click **Define information** 4. In the right-hand column, locate **Identification field** 5. Enable or disable the option as needed 6. Select the dynamic field you want to use as the identifier --- ### How It Works in Practice 1. Upload your **participant registration list** (with the chosen identifier field) 2. Conduct the training 3. Participants scan the **QR code** and access the form 4. They enter their identifying information and complete the missing fields 5. The system matches their submission to the existing record 6. 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