By comparison our local currency was actually more secure than a national currency:
- Our local notes were produced in more than one colour, requiring the use of an expensive colour copier to reproduce.
- The local notes were embossed with a special seal (raised print).
- All local note had a unique serial number as well as coded to say which area it was originally circulated.
- All notes had a special logo stamped on in special ink that temporarily went invisible when heated up (or when photocopied).
- The local notes were printed on special hemp/corn straw paper.
There were also institutional safeguards to prevent the counterfeiting off local currency. The local notes were only valid within a small geographical area (Calderdale) for items advertised locally. In addition, a person would have to have been well connected and known locally in order to be able to pass a quantity of local currency (it would not be financially viable to counterfeit a small number of local notes). Anyone so well known in the community would have been unlikely to be willing to risk their reputation passing forged local notes.