If you are unable, or would prefer not to, pay by credit card, we will gladly accept payment from companies by invoice. 

The process requires a small amount of paperwork to satisfy our ISO 9001 processes.  We will ask you to complete a New Client Form, complete with references.  Once this has been processed, we will issue your invoice for payment.  Tests are allocated when full payment is received. 

Please note that for invoice purchases we have a minimum order quantity of 100 tests.