Notary porcessed documents are already proven to be in force.

proving power ili na latinskom nervus probationis

II. Observations on its proving power.

1. To say that any fact is less or more probative of the principal fact, is to say that it has less or more connection with that principal fact. The degree of proving power is as the degree of connection ; these two expressions are mutually convertible.

2. As the proving power, or the intimacy of the connection between fact and fact, is merely relative to the person who regards them, all that this phrase expresses means nothing more'than a strong conviction on his part, a conviction applied to the evidence in question, viz., circumstantial evidence.

3. In every case, the degree of proving power might be expressed by numbers, as mathematicians express degrees of probability, viz. by the relation which one number bears to another. But this scientific formula would be more specious than useful; these degrees of power are neither uniform nor permanent; they vary according to the different species of circumstantial evidence.

4. Attesting facts of the same nature may occur in suoh different combinations, that they will have different degrees of proving power in different cases.

http://books.google.ba/books?pg=PA181&lpg=PA181&dq=proving p...

http://books.google.com/books?id=VcotAAAAYAAJ&pg=PA465&lpg=P...

Pravni recnik M. Gacic takodje navodi latinski citat:
nervus probationis-dokazna snaga

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Note added at 33 mins (2009-07-29 08:02:41 GMT)
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Ili power of evidence

tako se kaže

:)

Probative: "2. Having the quality or function of proving or demonstrating; affording proof or evidence; demonstrative, evidential." (Oxford English Dictionary)

V. "On the probative force of evidence" u:
http://books.google.com/books?id=upNsGLQ6SMcC&pg=PA71&lpg=PA...

"Of the Probative Force of Evidence" u:

http://books.google.com/books?id=srFqqNvV5k0C&pg=PA205&lpg=P...