Liberate yourself from the Original Mumbo-Jumbo that liberated you from the Original Sin you never had. You can display your Certificate of De-Baptism proudly framed in your hallway (porch, loo, lean-to, etc.) as an outward sign of the inner rationality that inspires your being.
After due deliberation, I, _______, having been subjected to the Rite of Christian Baptism in infancy (before reaching an age of consent), hereby publicly revoke any implications of that Rite and renounce the Church that carried it out. In the name of human reason, I reject all its Creeds and all other such superstition in particular, the perfidious belief that any baby needs to be cleansed by Baptism of alleged ORIGINAL SIN, and the evil power of supposed demons. I wish to be excluded henceforth from enhanced claims of church membership numbers based on past baptismal statistics used, for example, for the purpose of securing legislative privilege.