I believe this is actually "proper fact", both literally and properly translated. Basicly, in many Latin American countries Hechos (Facts) are not always such. For instance:

ORIGINAL:

"El Hecho Siete, por no ser un hecho propio, sinó especulaciones de la contraria, no puedo ni afirmarlo no negarlo."

TRANSLATION:

"Fact Seven, as it is not proper fact, but rather the counterparty’s speculation, I can neither confirm nor deny it."


In the case of your example, it should be as follows:

ORIGINAL:

"Aquella responsabilidad determinada legalmente sin hecho propio que constituya deliberada infraccion del orden juridica ni intencion de quebranto del patrimonio ni de los derechos ajenos."

TRANSLATION:

"Such legally-determined liability lacking proper fact, which constitutes a deliberate violation of the court order, or lacking intention to split the estate or third-party rights."

Circumstancially [sic] as properly defined does not fit here in any way:

1. of pertaining to, or derived from circumstances: a circumstantial result.
2. of the nature of a circumstance; secondary; incidental: of circumstantial importance.
3. dealing with or giving circumstances; detailed; particular: a circumstantial report of a business conference.
4. pertaining to conditions of material welfare.