When we use demand wording we also use an alternate maturity date ("On demand, but if no demand is made, July 31, 2006"). This comes from an attorney. His reasoning was that with a demand loan you'd basically have to have default for making demand.
Do you re-assess the customer and collateral periodically? How do you require the customer to provide updated financial information to reasses continuing with the relationship. Do all your loans have a written agreement to provide this information (i.e. financials, tax returns, borrowing base reports)?
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Just working here until I get my letter from Hogwarts.