When sending our confirmation letters on Reg E Opt Ins, we are including the required notice to the customer that they are able to revoke at anytime and how to do this.

We are also adding a line that states how many days it may take for us to process their request. Wondering if other banks have done this and if so what other banks are deeming as "reasonably practicable" for a time frame?

This is how it reads in the Reg:
A consumer may also revoke consent at any time in the manner made available to the consumer for providing consent. A financial institution must implement a consumer's revocation of consent as soon as reasonably practicable.

Any help or opinions you can offer are appreciated!

In the opinion category: Your bank should be able to implement an opt-out in the same time frame you implement an opt-in. If not, then I suggest you refund any fees you impose in the interim.

Examiners would be gleeful if they thought you were dragging your feet on this...

Our staff has been informed that they MUST do the account maintenance on ANY Reg E opt form (whether consent to optin or revoke consent) the day it is rec'd or have a very good explanation for why it didn't get done. There is no "reasonable" delay for us. It's a simple matter of maintenance. If we can opt them in in a minute, I can opt them out in a minute too.