Here is an interesting little bit I found.
"A 16th century manuscript tells of Samuel the Pious, who created a mute golem that accompanied him on his travels and waited on him. In 17th century Poland this servant becomes dangerous. Another tale concerns Rabbi Elijah Baal Shem of Chełm (d. 1583). Written in 1674, it tells of the fasting that was necessary to create a (mute) golem which did the housework. The word emeth ('truth'), written on its forehead, activated the golem, which grew steadily. Rabbi Elijah’s grew so big he could not reach its forehead to rub out the letter aleph (changing emeth into meth, 'death'). Instead he commanded the golem to remove his boots and when he bent down he erased aleph and the golem turned to mud again, collapsing on and killing Elijah. This is the 'classic' later golem myth, although the idea of writing emeth on the forehead is older than the Chełm story - 13th century Hasidic texts claim that it was written on Adam’s forehead (Scholem). Other versions have emeth sewn onto the arm, or written on a parchment and placed in the mouth (in this case the trick to erasing aleph is kissing the golem)."
taken from this site
Personally, I had only heard about the slip of paper in the mouth. I thought you were supposed to write what you wanted it to do on the paper though. I believed that it was basically a servant of sorts and had little intelligence. I had sort of forgotten about this topic until it was brought up here.
