> ## Documentation Index > Fetch the complete documentation index at: https://developer.copper.co/llms.txt > Use this file to discover all available pages before exploring further. # What are Fees Vaults Fees vaults are a type of MPC vault that are used to pay fees for token transfers from proxy wallets to the destination accounts. In order to sign and broadcast the required transactions, a Dockerized application made by Copper is provided to process transactions along with [Copper Unlimited Online](/guides/copper-unlimited-online). When orders are created by the Copper Platform to pay fees for token transfers from proxy wallets, the Dockerized application will then sign using [Copper Unlimited Online](/guides/copper-unlimited-online) and broadcast the transactions to the blockchain automatically. If you want to use your own fees wallets to pay fees, contact your account manager to set up a specific fees wallet account in your organization.