A Letter of Default on Promissory Note sample letter.
Reference is made to a certain promissory note under date of _, 19_, in the original amount of $_.
You have defaulted under said note in that the installment due on _, 19_, in the amount of $_ has not been paid.
Accordingly, demand is hereby made upon you for full payment of the entire balance on said note in the amount of $_, including accrued interest to date.
In the event the entire balance is not paid within the next seven days, I shall refer this matter to an attorney resulting in additional costs of collection.