List Management
Create and manage reusable value lists for allow and block rules using card fingerprints, emails, IPs, and more.
The List Management page lets you create and manage reusable value lists that power your fraud detection rules in Corgi Intelligence.
What Are Lists?
Lists are collections of values, such as emails, card fingerprints, IP addresses, or customer IDs, that can be referenced in your fraud rules. Rather than hard-coding individual values directly into each rule, you maintain a central list and point your rules to it. When you update the list, every rule that references it automatically uses the latest values.
For example, you might create an email block list containing known fraudulent email addresses. You can then create a fraud rule that rejects any transaction where the customer's email appears on that list. If you discover a new fraudulent email, you add it to the list once, and all linked rules immediately apply it.
Default Lists
Corgi provides several default block lists that are pre-populated with known bad actors. Default lists are managed by the system and updated automatically.
| List | Description |
|---|---|
| Card Fingerprint Block List | Known fraudulent card fingerprints. |
| Email Block List | Known fraudulent email addresses. |
| Email Domain Block List | High-risk email domains commonly used for fraud. |
| Client IP Country Block List | Countries associated with elevated fraud rates. |
| Customer ID Block List | Known fraudulent customer identifiers. |
| Charge Description Block List | Suspicious charge descriptions that signal risky transactions. |
| Card Country Block List | Card-issuing countries to block. |
| Client IP Address Block List | Specific IP addresses associated with malicious activity. |
Default lists are identified in the main table by a Default badge next to the list name.
Custom Lists
In addition to the system defaults, you can create custom allow and block lists for any supported attribute type.
Supported Attribute Types
| Type | Description |
|---|---|
| Card Fingerprint | Unique card identifier. |
| Customer email address. | |
| Email Domain | Domain portion of the email (case-insensitive matching). |
| Customer ID | Your internal customer identifier. |
| Country | Country code. |
| IP Address | Client IP address. |
| Charge Description | Transaction description string (case-sensitive or case-insensitive matching). |
| Card BIN | Bank Identification Number (first 6–8 digits of card number). |
| String | Flexible string matching for custom attributes. |
You can create custom lists for either allowing or blocking, depending on how you configure them in your rules.
List Details
The main List Management table displays every list in your workspace, both default and custom, with the following columns:
| Column | Description |
|---|---|
| Name | The display name of the list. Default lists show a "Default" badge. |
| Alias | The programmatic reference used when selecting the list in rule conditions. Keep aliases short and descriptive, such as fraud_emails or trusted_ips. |
| Type | The attribute type the list matches against (for example, Email, IP Address, or Card BIN). |
| Items | The current number of entries in the list. |
| Created By | The source of the list: "System" for defaults, or the name of the team member who created a custom list. |
| Created | The timestamp when the list was created. |
You can sort and filter the table to quickly find the list you need.
Creating a New List
To create a custom list, click + New List in the top-right corner of the page. You will be asked to provide the following:
Name
A descriptive display name, such as "Trusted Corporate IPs" or "High-Risk Email Domains."
Alias
A short, unique identifier used in rule conditions. Aliases must be easy to reference when building rules. For example, an alias of trusted_ips is easier to work with in a rule condition than a long display name.
Type
The attribute type that entries in this list will match against. Once selected, this type cannot be changed. Choose the type that aligns with the data you want to match in your transactions.
Entries
Add values to the list using one of two methods:
Manual entry: Type or paste individual values one at a time.
Bulk import: Import many values at once. Import formats and file-type requirements are displayed in the import dialog.
After you save the list, it becomes available immediately in the rule builder. You can add or remove entries at any time.
Next Steps
Learn how to build fraud rules that reference your lists
Review the default lists regularly to understand the threat categories Corgi tracks
Last updated: 2026-07-01
Last updated: 2026-07-08