SRD:Demand

You contact a particular creature with which you are familiar and send a short message of twenty-five words or less to the subject. The subject recognizes you if it knows you. It can answer in like manner immediately. A creature with an Intelligence score as low as 1 can understand the demand, though the subject’s ability to react is limited as normal by its Intelligence score. Even if the demand is received, the subject is not obligated to act upon it in any manner.

If the creature in question is not on the same plane of existence as you are, there is a 5% chance that the demand does not arrive. (Local conditions on other planes may worsen this chance considerably.)

The message can also contain a suggestion, which the subject does its best to carry out. A successful Will save negates the suggestion effect but not the contact itself. The demand, if received, is understood even if the subject’s Intelligence score is as low as 1. If the message is impossible or meaningless according to the circumstances that exist for the subject at the time the demand is issued, the message is understood but the suggestion is ineffective.

The demand’s message to the creature must be twenty-five words or less, including the suggestion. The creature can also give a short reply immediately.

Material Component: A short piece of copper wire and some small part of the subject—a hair, a bit of nail, or the like.