[date]

[lessee name]
[lessee address]

Dear [lessee name]:

This is to inform you that you are in default of our lease agreement dated [date], 19XX, because:

[list reason(s) in default]

Default is a serious matter - unless you contact the undersigned within [5, e.g.] days from receipt of this notice, we shall take all necessary steps to recover our losses, including repossession of the following item(s):

[list item(s) subject to repossession]

Thank you for your prompt action in this urgent matter.

       Sincerely,

       ___________________________________