I do not understand how to enter a loan (to a friend) which he should return in an indefinite future (not in a fixed day of a month or like this) without an interest rate. Please re-design your Loan account dialog to make this easier to enter and understand. Now your Loan dialog is bloated with interest rates and other information useful when dealing with a bank. I need to deal with a friend not a bank. Please make it easier to lend to a friend and record the information easily (and without definite dates). See also my previous bug report https://bugs.kde.org/show_bug.cgi?id=379695
The Loan account is designed for bank loans. Since you do not want a bank loan, don't use the bank loan account type. For your needs, you could just create a Cash account named "Loan To Friend". Add a transaction to "Pay To" your friend, make up a category, like "Loan", and enter an amount. When your friends pays you back, enter the amount as a "deposit".
*** This bug has been marked as a duplicate of bug 379695 ***