Cleanlist handles mailings on behalf of some of our clients, and we do not have access to any database with the information to be able to remove or change an address. The best way to handle any mail you have received in error is to write “Return to Sender” on the envelope and put it back in the mail. There is no need to add any additional postage or stamps to the piece of mail.
When we receive any returned mail, we scan the barcode on the front and return this information to our clients, letting them know the mail was returned so they can update their records. It can take some time for this to resolve itself if there are multiple accounts, the accounts are transferred, or there are legal requirements to send a letter to the last known address, but returning any mail that is received in error is the best way to take care of this.