what is the best/easiest way to transfer a farcaster account to another custody address? is there a doc or tool for this?

There is no official documentation or tool specifically for transferring a farcaster account to another custody address. However, the process typically involves withdrawing your funds from your current account and depositing them into a new account with the desired custody address. 

To do this, you will need to log into your farcaster account and initiate a withdrawal of your funds. You can then create a new account with the new custody address and deposit the funds into it. 

It is important to ensure that you follow the proper security measures when transferring your funds to a new account to prevent any unauthorized access or loss of funds. If you are unsure about how to complete this process, it is recommended to seek guidance from a financial advisor or the customer support team of the farcaster platform.