A traveller whose flight was booked but who had not yet received their Letter of Introduction / Port of Entry (POE) letter asked what to do.
The thread gave conflicting views, worth knowing about before you travel:- One member said you can't travel without it, expecting it to normally arrive the same day your passport is stamped with the visa.
- Another member said it isn't strictly necessary — travelling without it is possible, and having the POE letter mainly just saves time during the immigration interview rather than being a hard requirement.
Because the thread itself disagreed, don't rely on either view alone: contact IRCC or your visa office directly to confirm your specific situation, and consider contacting your airline in advance to check their documentation requirements for boarding, since this can be stricter than the immigration requirement itself.