If you are a good customer who is late renewing one time, they may accept your late payment and claim that your coverage was not disrupted.
However, I sure as hell wouldn`t want to depend on this if my house had burned down during this time.
I am quite sure that they would say I am fucked.
Especially if I simply let my policy expire and had not contacted them about renewing and making a late payment.
I don't know if you actually read what I wrote, or don't believe me, but it will depend whether a grace period is built into your contract. If not, I would not rely on goodwill at all - that's insane. The insurance company will laugh at you.
Here's some material from the Insurance Act of Ontario. I haven't traced through where all this is applicable, but gives you the idea about how grace periods work if applicable:
http://www.ontario.ca/laws/statute/90i08
Period of grace
(2) Where a premium, other than the initial premium, is not paid at the time it is due, the premium may be paid within a period of grace of,
(a) thirty days or, in the case of an industrial contract, twenty-eight days from and excluding the day on which the premium is due; or
(b) the number of days, if any, specified in the contract for payment of an overdue premium,
whichever is the longer period.
Contract in force during grace period
(3) Where the happening of the event upon which the insurance money becomes payable occurs during the period of grace and before the overdue premium is paid, the contract shall be deemed to be in effect as if the premium had been paid at the time it was due and, except in the case of group insurance or of creditor’s group insurance, the amount of the premium may be deducted from the insurance money. 2012, c. 8, Sched. 23, s. 17 (2).
Look at this CAA brochure for an example:
https://www.caaneo.on.ca/sites/all/files/CAANEO_MAPP Brochure.pdf
XIV. REINSTATEMENT OF INSURANCE – GRACE PERIOD
If insurance has terminated by reason of the non-payment of premium
on the premium due date, insurance can be reinstated subject to the
following conditions:
a. if the premium is paid within 30 days of day of the month in which
the premium became due (Grace Period), the reinstatement will date
back and be effective on the premium due date and be of the same
force and effect as if the additional premium had been paid by the
date it became due;
b. if the premium has not been paid within the 30 day Grace Period,
the Member cannot reinstate the insurance following the Grace
Period. A new policy will have to be purchased