我好不容易找了个依据。根据大银行的规定,一般是在renew时不需要re-qualify的,直接会通知renewal的新的利率。
但是在有些情况下:可以拒绝,比如信用记录变差,寄信之前自动查。或者就算是可以renew, 给你一个很差的利率也是等于是逼你卖房。
Why You May Be Denied By Your Current Lender
If you decide to simply renew with your existing lender, you would think the process would be easy. See, the one good reason to stick with your current lender is that they don’t need to re-qualify you (i.e. determine your
debt service ratios). So, typically, as long as you’ve made all your
mortgage payments throughout your term, there’s no reason your current lender would deny your mortgage renewal application.
However, even though they don’t need to re-qualify you,
your lender will still review your current financial situation (including your credit score) and see if you’ve racked up more debt than they believe you can afford to repay, or see if your employment situation has changed for the worse. If anything about your finances concerns your current lender, they can choose not to renew you.
https://www.ratehub.ca/blog/what-happens-if-your-mortgage-renewal-is-denied/
http://www.whichmortgage.ca/article/what-to-expect-during-your-mortgage-renewal-216887.aspx