Hmm... sign a contract? I assume it is a verbal contract. Worms don't have hands or arms.Of course all my renters sign a contract, however, it is tailored due to the needs of the individual. Coral renters must have good polyp extension and be healthy all the time, violation of these terms means the offender must have a dip or operation performed. Free-swimming inhabitants must eat at least once daily and be very happy, violation of these terms could lead to QT or dip protocols. But my worst offenders are definitely the anemones, always violating their contracts by walking all over the place but I let them stay because they pay all their rent and fees on time