45. Joint transfer for consideration.- Where immoveable property is transferred for consideration to two or more persons, and such consideration is paid out of a fund belonging to them in common, they are, in the absence of a contract to the contrary, respectively entitled to interests in such property identical, as nearly as may be, with the interests to which they were respectively entitled in the fund; and, where such consideration is paid out of separate funds belonging to them respectively, they are, in the absence of a contract to the contrary, respectively entitled to interests in such property in proportion to the shares of the consideration which they respectively advanced. In the absence of evidence as to the interests in the fund to which they were respectively entitled, or as to the shares which they respectively advanced, such persons shall be presumed to be equally interested in the property.
Question: What documents are valid proofs to prove that the money was paid out of seperate or joint funds?
