Linked Account

Those are accounts that belong to your clients who are, for example, entities with common ownership or persons from the same family or otherwise clients that are connected or coordinate their activities when it comes to using your services.

Sources:

Venture Line. Retrieved from: https://www.ventureline.com/accounting-glossary/L/linked-account-definition/

Bank West. Retrieved from: https://www.bankwest.com.au/help/my-account/linked-account-information

LinkedIn. Retrieved from: https://www.linkedin.com/pulse/what-linked-accounts-why-important-yana-afanasieva