What you usually discover
- How much client data was actually incomplete or outdated.
- How often you kept making the same manual corrections, without noticing the pattern.
- How long the old process really took, compared to how you remembered it.
Why the first invoices matter more
The first ones issued in a new system force you to clarify the real data and workflow, not the assumed one. Every correction made now prevents the same mistake from repeating months later.
What to do with the observations
Note down what was unexpectedly hard or easy, those observations say more about your real invoicing process than any assumption made before you actually started.
Bottom line
The first ten invoices are, in effect, a free audit of your own billing process. They deserve attention, not just a quick tick as an administrative task.