To end financial usurpation: interest, inflation, funneling, boom-bust cycles,...
the Benefit Receiver, to confirm benefit received:
- marks on a public wall, ledger, or an IOU
- the Benefit Provider
- the Value of the Benefit
- in an objective, measurable, invariant Unit of Account
 
for the Benefit Provider to be able to
- redeem/use as offset for the same value in the future
- show track record eg for a loan of such marks
 

Ghost Money: Chile's Unidad de Fomento