People are jumping to the "scam" conclusion, and I'll admit, I did too. However, it seems that this is actually a company that various charities hire to do telephone canvassing for them, hence why you see multiple charities listed here.
We were told that the donations were for Sick Kids, and that a donor was matching donations. When we asked for more information, we were directed to the official Sick Kids website but couldn't find anything matching what the caller was talking about. They did not pressure us to make a donation at that moment, but agreed that finding more information online and donating directly was also acceptable.
I've sent an e-mail to Sick Kids to see if they can shed a little more light on the situation, and will report back.
I've received a reply from Sick Kids. This is a genuine phone call, not a telemarketer or a scam.
"Thank you for your email. We are currently running a program in which our donors are being contacted to advise them of the matching gift incentive.
"The call you received was not a fraudulent call. Unfortunately, we do not have any information available on our website or via mail about the matching gift program as the donor has requested to remain anonymous.
"The donor does have a relationship with the hospital as her grandchildren have been treated at the hospital and so this is why she has chosen to give back."
It was on behalf of Sick Kids. They knew that I donated for a short a while several years ago and they wanted to see if I'd reinstate a monthly donation.
My main annoyance/concern is that I've never been listed under or used my parent's house landline as a reference.