Restricted free agents have the right to move to a club of their choice, subject to the current club’s right of first refusal over their services. That is, if the current club can ‘match’ the offer from a suitor club, the player must stay or enter the draft. The tabled offer includes only football payments and Additional Service Agreements (ASA) amounts.
http://www.afl.com.au/afl-hq/the-afl-explained/free-agency
http://www.afl.com.au/afl-hq/the-afl-explained/free-agency