After something is done.
WHY THEY MATTER
Doubt after an action causes repeat submissions and support requests.
WHAT TO CONFIRM
What happened What it means What happens next How to get help
WHAT TO INCLUDE FOR A TRANSACTION
A reference What was bought or submitted The amount The expected timescale Contact details
WHY THE REFERENCE
It is what people quote when something goes wrong.
WHAT TO SEND AS WELL
A message, so there is a record.
WHAT TO OFFER NEXT
A sensible following action.
Not a dead end.
WHAT TO AVOID
A bare confirmation with no detail Confirmation that disappears before being read Assuming the person remembers what they did
WHAT TO DESIGN FOR PARTIAL SUCCESS
Where some of an action worked and some did not.
State precisely which.
WHAT TO TEST
Whether the confirmation alone tells the person everything they need.