You have to send them your credit/debit card information. This was taken from the website"Please DO NOT mail the form to the United StatesThe non-refundable application fee for a passport renewal by mail is $110.00. Download the credit card payment form, here, as a PDF. Before submitting the form with your application, notify your credit card company, otherwise the payment may be declined. Original evidence of your name change, if applicable, such as marriage certificate, Change of Name Deed Poll or Statutory Declaration and court order."
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