The easiest way for a loan between family is to type out the loan document setting forth the terms (amount loaned, interest rate, length of loan and security for it), have it signed as well as a promissory note and a security agreement for the loan recorded on the property that is the basis for the loan.There are numerous sources online that you can use as templates for what you want done to give you guidance. You might also go down to your local county law library and ask the librarian for assistance with the forms that you will need so you can draft up what is needed for the loan you want and need.Good luck.