Yes, If you are withdrawing funds via RTP from your Dwolla Client account or a business Verified Customer record. If you attempt an RTP withdraw from a personal Verified Customer record then you should get an error response of Real Time Payments withdrawal from a personal account is currently not supported. Same Day ACH withdraws is supported for all balance holding accounts.
Unfortunately we don’t support metadata on balance to bank or bank to balance transfers. We do have this as a Product feedback item that we’re hoping to support in the future. You could look at using the correlationId field as an alternative.