If you want to make your own necropants (literally; nábrók) you have to get permission from a living man to use his skin after his dead.
After he has been buried you must dig up his body and flay the skin of the corpse in one piece from the waist down. As soon as you step into the pants they will stick to your own skin. A coin must be stolen from a poor widow and placed in the scrotum along with the magical sign, nábrókarstafur, written on a piece of paper. Consequently the coin will draw money into the scrotum so it will never be empty, as long as the original coin is not removed. To ensure salvation the owner has to convince someone else to overtake the pants and step into each leg as soon as he gets out of it. The necropants will thus keep the money-gathering nature for generations.

Back when feather pillows were the norm in Appalachian households, it was not uncommon to find a hardened mass of feathers whose quills had turned inward and locked together forming a disc, or crown, in the pillow of the gravely ill, or recently deceased. Finding such an artifact in the pillow of someone ill was a sure sign that the person would die within the next three days, but it was a comforting symbol when found in the pillow of the recently deceased. Finding a crown in a person's pillow meant that the person has gone to Heaven. [Source: Theresa's Haunted History of the Tri-State]

"The custom of distributing to the mourners at a funeral specially prepared biscuits in wrappers sealed with black wax, was formerly widely prevalent in Great Britain... The practice may be an altered survival of ceremonial cannibalism when the flesh of dead kinsmen was eaten by the mourners."