There are many ways you can plan to care for those you love after you are gone. In addition to leaving inheritances through your will, you can name beneficiaries on a life insurance policy or RRSP account. This typically provides the named beneficiaries with a quick source of cash. Depending on the type and amount of property you have, it may make sense to leave your RRSPs to one person, and other property to another.
However, distributing certain assets, like RRSPs, comes with tax consequences, and your estate is liable for these costs, not the person who receives the funds. If this is not coordinated properly, it can result in unintended consequences, unequal distributions, and hard feelings between beneficiaries.
Make sure to consult with your financial advisor as well as your estate planning lawyer before making, or changing, beneficiary designations.