It is the gaining registrar that is responsible for the transfer operation, so you need to apply to perform the transfer with them, not the losing registrar. Once you have made the application, the gaining registrar is responsible for ensuring that the transfer request is a valid request from the domain's owner. This validation normally comes in the form of an e-mail sent to the admin contact which requires a reply, though some registrars use signed faxes as an alternative. In addition, some losing registrars have decided that 'double-checking' is a good idea, so when you request a transfer away from them, they will perform additional security checks. They may require you to answer an e-mail within a short time period, or even send a notarized letter. After the transfer is complete, a year is always added to the end of the domain registration period.