Overview
Custodia allows you to manage how merchants and merchant categories interact with company expenses and card usage:
Merchant Records – Update the default expense type assigned to a merchant so future transactions map correctly.
Merchant Categories Control – Allow or block merchant categories (MCCs) by user role, ensuring only approved roles can transact with specific categories.
Merchant Block List – Block individual merchants at three levels: company-wide, employee-level, or personal. Admins can create, update, or remove blocks directly from the Custodia web app.
Merchant Records
You can update the default expense type for a merchant from the Merchant Records screen. To do that click on the edit icon on the right and then change the value of the Default Expense Type field. Afterwards click the green check to save the change. The merchant will now be associated with the new expense type on transactions going
Merchant Categories Control
You can update the merchant categories (MCC) that are allowed / blocked on a role basis from the Merchant Categories Control screen.
To make a change search for the MCC you would like to update and click on the edit icon. From there you can add / remove roles to the blocked / allowed list.
After you are done making changes click on the green check to save the updates.
Merchant Block List
As admin, you have control over where company cards can be used by allowing you to block specific merchants.
Blocking merchants can be done at three levels:
Company-wide blocks – Apply to all employees
Employee-level blocks – Apply to selected employees
My blocks – Personal blocks managed by the logged-in user
Navigation
Log in to the Custodia web app from your browser (Chrome is recommended) at https://my.custodia.ai.
From the top menu, select My Organization → Merchant Control → Merchant Block List.
Creating a Block
Click on the "+" add icon in the bottom right hand corner
Use the search or filter options to locate the merchant you want to block
Select the merchant, define the level of the block (company level or user level)
SAVE to add the block to the list
Managing Blocks
View Current Blocks – Switch between company-wide, employee-level, or personal blocks to see all existing blocks.
Update or Remove – Click the refresh icon (🔄) to update your view, or select a merchant to and use the green hover menu to remove the block