TDL online credit card payment

To pay a TDL invoice by credit card, please fill out the form below. You will be directed to a secure Web site to enter your credit card information. We accept Visa, MasterCard, American Express, Discover, and Diners Club. You can pay up to three invoices at one time.



Invoices cannot be canceled. If you dispute a charge on your invoice, please contact Paul Koch at 608-262-6531 or Cancellation of individual articles on an invoice may be requested by contacting Paul Koch (see above). Cancellations are not guaranteed.


Refunds are only issued in the event of an overpaid invoice. Contact Paul Koch at 608-262-6531 or if you have overpaid. Please provide the invoice number and proof of the overpayment (receipt or credit card statement). Refunds may take up to 10 business days to process from the date we receive your request.

Privacy Statement

The Turfgrass Diagnostic Lab does not sell, rent, trade or distribute any personally identifiable information obtained from clients to a third party, except in cooperation with government agencies or as required by law. Collected information is used for the administrative and operational purposes of our services only.

Doing Business As

Our doing-business-as name is Turfgrass Diagnostic Lab. This is the name that will appear on your credit card statement for any transaction with our organization.

Customer Service

If you have any questions, please contact Paul Koch at 608-262-6531 or Thank you.