all you need to do before you do the ritual is inform your spirit companions what you are doing.
place the square on an altar or a space where you conduct your rituals. write your name on the back of the square. light a candle. and place your hand on the square. and say the following:
Rahmaat Arwah karimah cHazar gHayyar.
you may add the name of your Deities if you like. but also add the names of God and the Goddess in Arabic as well.
such as Allah and Allat or Alilat. although these names appear Islam they are far more ancient. the other names i have used were El and Elat. i have also used the name of Lilith Zahriel Ishet Adam Qadmon Lilith Zahriel cHavah Qadmon since she is a primodial Female and the daughter of Allah and Allat. she is called Laylah and Lilitu .
after the ritual fold the square in 4 times. then burn it in a tissure. and light strawberry incense to make peace with your spirits.