Hi Pipis Husband,
I organised the pick up from the UK and i was sent a form to fill by my courier.There was no space to include the UCI number in the form,just my name and fedex account number. You can still squeeze in your UCI on the form near your name with a pen
I guess the Canadian High Commission usually request for UCI numbers from couriers( this is just an assumption), hence the reason why the courier was sent back the first time.However,i dont seem to have explanations for 'come back tomorrow' afterwards. If you include a print out of the pick up email in your package with your passports, the VO is able to trace it. If the VO is not ready to release the passports, the courier will be asked to return later
If i may ask,in your case,was it immediately the courier went to get the pick that it was given?How many days did it take to get your passport? Not always, I got mine back within 2 weeks. For some people, it was up to 3 weeks. All you need is patience as sometimes VO delays to release the passports to the courier company