Here's some stuff in my contract, hope it helps.
In the event that the Customer shall sell, or otherwise dispose of the land and premises, or commit an act of bankruptcy, or allow a judgment or lien to be registered against the land and premises, the whole of the unpaid balance shall immediately become due and payable to the Contractor.
Payment schedules will be according to the reverse side of this Agreement. The full amount of the invoice balance is due and payable upon delivery of the invoice. An interest charge of 2% monthly (26.8% annually) will apply to all accounts not paid within 30 days of the date of the invoice. A $25.00 service charge will apply to each payment that is dishonored by the bank for any reason. Postmarks are not acceptable as proof of payment date.
If the Customer breaches this Agreement before the Contractor has commenced the installation, application or ordering of the materials, the Customer agrees to pay the Contractor as liquidated damages a sum equal to 10% of the total contract price.
It is understood and agreed by both parties that payment in full of this Agreement signifies satisfactory completion of this contract.
The Customer in possession of the goods, and not in default of this Agreement, shall have clear title to the goods.
