The forms of these are so varied and so constantly increasing that it is useless to attempt to give even a list of them. It may be said in general that the details are usually described in a document in the nature of a deed of trust, a mortgage agreement, or the "holding" document of some form of collateral security. Whatever the form may be, the auditor should insist upon seeing the original document or a reliable copy thereof, from which he can make an analysis of all the particulars.

Upon such an analysis being made, the auditor should see (1) that the accounts are so arranged as to show clearly the transactions, especially any particular points involved, and (2) that the terms of the agreement have been complied with. This may involve an examination into the disposition of proceeds of sale of lands involved, the proper entry of interest, the proper lodging of securities, etc.