Iowa Code § 633.77: Receipts by one fiduciary.

One of the several fiduciaries may receive and receipt for any money, which receipt shall be given by the fiduciary in the fiduciary’s own name only, and the fiduciary must individually account for all the money thus received and receipted for by the fiduciary, and this shall not charge any cofiduciary, except insofar as it can be shown to have come into the cofiduciary’s hands.