About 10-12 months ago I started receiving emails addressed to someone else. The first time it happened I figured it was just a typo on the senders part. But then I got more emails from different senders, all addressed to the same person (with a similar name as mine). I've received emails for her ranging from job interviews, order and shipping confirmations to the most recent one being a legal document that looks rather important. The other person lives in Canada while I live in the US - is it possible that she has the same email address but with @gmail.ca (instead of @gmail.com)? Since I've received so many of her emails, it makes me wonder if she received any of mine? I just want the emails to stop and I don't know how to do that aside from sending her a letter (I have her full name and address but the letter would be international and I don't feel like paying to tell someone to change their email address).
There's no reason why it's her who has to change email addresses - you can just as easily change yours.
There is no gmail.ca all google addresses are .com.
There is yahoo.ca (well there's definitely yahaoo.ie, so I'm assuming there's also .ca), but I think they make addresses unique across all domains.
It would be courteous of you to reply to each sender, saying
"You have sent this message to me at email@example.com however the contents is not relevant to me. I suspect it was meant for firstname.lastname@example.org, please check and update your records."