Certifying competency
I think you'll find that when you come back to finish off your CPL, the flying school will have to fill out a form certifying your competency for a long list of items listed in the 'Day VFR Syllabus'.
It is my understanding that each item in the 'Day VFR Syllabus' under CPL has to be observed to the commercial standard three times before it can be signed off.
Once all items have been signed off then a CFI can recommend you for your CPL test. Make sure you discuss what the requirement for certifying competency will be with the CFI whom you intend to ask for a recommendation.