The Garn St. Germain Act provides due-on-sale does not apply in:
* (1) the creation of a lien or other encumbrance subordinate to the lender's security instrument which does not relate to a transfer of rights of occupancy in the property;
* (2) the creation of a purchase money security interest for household appliances;
* (3) a transfer by devise, descent, or operation of law on the death of a joint tenant or tenant by the entirety;
* (4) the granting of a leasehold interest of three years or less not containing an option to purchase;
* (5) a transfer to a relative resulting from the death of a borrower;
* (6) a transfer where the spouse or children of the borrower become an owner of the property;
* (7) a transfer resulting from a decree of a dissolution of marriage, legal separation agreement, or from an incidental property settlement agreement, by which the spouse of the borrower becomes an owner of the property;
* (8) a transfer into an inter-vivos trust in which the borrower is and remains a beneficiary and which does not relate to a transfer of rights of occupancy in the property; or
* (9) any other transfer or disposition described in regulations prescribed by the Federal Home Loan Bank Board.
Is the OP a relative of the aunt's TRUST?
Obviously, we don't get to use the tax theory of disregarded entity as inter-vivos trusts are clearly addressed in the act as an entity.
In fact, since it's not "illegal" to not notify the bank when a transfer occurs, some commentators use an inter-vivos trust as an artifice to sell property to a third party and keep the mortgage. Seller creates a inter-vivos trust with buyer as trustee and seller as beneficiary. Seller funds trust with property, loan can't be called by law. Seller assigns beneficiary status to buyer, who was already making payments as trustee. Bank has no idea in the change of ownership.
The due on sale clause could be called in the above instance, it's just that if the buyer or seller don't tell the bank, there is no way they'd ever know.
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Now that I read a bit more, it seems many reasonable commentators believe it would still apply to a trust to grantor relative. I'm looking for a citation or case, but I take back my disagreement.