The key is to make sure that your customer is made aware of your terms and conditions before the sale is agreed. Relying on including a copy of your terms and conditions on the back of your invoices is not good enough. By the time the customer sees the invoice, the sale has already been agreed.
One option is to provide a copy of your terms and conditions as part of your credit control process when a new customer applies for credit. Ask them to sign a confirmation that they have read and understood them. And make sure you highlight key terms, such as the credit period. It’s no good hiding away important details in the ‘small print’.