[ULPIANUS libro quinto disputationum. ] §30.1.77.prSi pecunia fuit deposita apud aliquem eiusque fidei commissum, ut eam pecuniam praestet, fideicommissum ex rescripto diui Pii debebitur, quasi uideatur heres rogatus remittere id debitori: nam si conueniatur debitor ab herede, doli exceptione uti potest: quae res utile fideicommissum facit.
[ULPIAN, Book 5 of the Disputations.] If money has been deposited with someone, and a trust has been committed to his good faith that he should pay that money, the trust will be due under a rescript of the Divine Pius, as if the heir were deemed to have been requested to release it to the debtor; for if the debtor is sued by the heir, he can employ the plea of fraud; and this circumstance makes the trust effective.
quod cum ita se habet, ab omni debitore fideicommissum relinqui potest.
Since this is so, a trust can be left by any debtor.