C-16: A problem was raised as a dispute rather than absorbed

When to open one

After the stated dispatch window has clearly passed with no dispatch, after a reasonable delivery period following dispatch, or when what arrived does not match the order. Not while a stated window is still running, since that produces a weak case and a poor record.

What a submission should contain

1. The order reference and the relevant dates, stated first
2. What was ordered, what arrived, and when
3. Any listing terms that bear on it, quoted accurately
4. The outcome you are asking for

What to leave out

Characterisation of the other party, repetition of the same point, and description of how the situation feels. Arbitration compares two accounts against whatever the market recorded. Material that cannot be checked adds length without weight, and length reads as uncertainty.

The evidence boundary

Only what happened inside the market message system is visible to arbitration. A conversation moved to an outside channel effectively does not exist for the process, which is the practical reason to keep order discussion on the market rather than a matter of preference.