24 CFR 330.30: GNMA Guaranty.

(a) Securities held by Depositories. Ownership of multiclass securities registered in the name of a Depository shall be conclusively established by registration in the name of the Depository as owner on the books and records of the Multiclass Registrar, and it shall be unnecessary for a Depository to maintain custody of any physical certificates evidencing such ownership.

(b) Guaranty. The Association's guaranty is a guaranty that payment will be made to the registered owner of securities as reflected on the books and records of the Multiclass Registrar.

(1) The Association makes no other guaranty, including any guaranty that a Depository will appropriately credit payments to beneficial owners of GNMA multiclass securities. The Association's guarantee of securities payable to a Depository or its nominee becomes effective when the Depository or its nominee is registered as the registered owner of the securities on the books and records of the Multiclass Registrar.

(2) The Association guarantees the timely payment of principal and interest as provided by the terms of the multiclass security. The Association's guaranty is backed by the full faith and credit of the United States.