Be sure to check the Claim criteria before you make a claim.
To make a claim on a payment, send an e-mail to Worldpay at guarantee@worldpay.com.
In the e-mail, please include:
Your name
The name of your business
Your merchant/administration code
The unique payment number from the payment confirmation e-mail
The amount
The name provided by the shopper
Brief details of the payment
Any other information you consider relevant.