Elder Futhark
Tiwaz is Týr, the god who put his hand in the wolf's mouth so the binding would hold and lost it. The rune is justice that costs the person delivering it. Today there is a right thing to do and it has a price attached, and the price is yours. Do not look for the version where it is free. Pay it once, cleanly, and the binding holds. Pay it grudgingly and you will be asked for the hand again next week.