[ULPIANUS libro secundo regularum. ] §46.4.19.prSi accepto latum fuerit ei, qui non uerbis, sed re obligatus est, non liberatur quidem, sed exceptione doli mali uel pacti conuenti se tueri potest.
[ULPIANUS, Rules, Book II] If an acceptilation is made to one who is bound not by words, but by a thing, he is indeed not released, but he can defend himself by the plea of fraud or of an agreed pact.
§46.4.19.1Inter acceptilationem et apocham hoc interest, quod acceptilatione omni modo liberatio contingit, licet pecunia soluta non sit, apocha non alias, quam si pecunia soluta sit.
The difference between an acceptilation and a receipt is this: by an acceptilation, release occurs in any event, even if the money has not been paid; by a receipt, not otherwise than if the money has been paid.