Meter tilted or in wrong position might cause the meter is not correctly when registering the consumption. This type of Fraud can be intentionally done by customer. Or... the meter can be titled because the technician did not assemble the position firmly. Thus, over the time, the meter position is tilted.
This tilted position of meter can cause the disc to touch the brake and slow down the consumption registering. 
Double feeding is done by customer when he/she tried to make an additional feeding directly to the line so that the consumption for additional feeding is not registered. He/she will still have the legal service and the meter will register only the consumption for the legal service. Usually the additional feeding is done to connect for appliance that requires more electricity load (ex: air condition, pump, etc.) For the rest of appliances like lights, the customer let it register in the legal connection so that the Electric company will not get suspicious.
This happen when customer tries to bypass the connection so that the meter is not registering the consumption. No action done on the meter by doing such case. This type of fraud is easily detected and easily resolved.
Example of meter manipulated:
- Brake manipulated so it touches the disc. It will slow down the disc rotation.
- Space out or braked gears. The rotation of disc will not be recorded correctly.
- External potential open. This will not record any consumption even if the disc is rotating.
- Disc tilted. It will not record the correct consumption.
