In most cases, yes. At present, this is possible (as an additional tax-deductible gift) when donors pay by bank/ACH transfer, credit/debit card and PayPal. On the “Choose a Payment Method” page of the Giving Basket donation form, all donors are advised that “You will have the opportunity to cover the payment processing fees on the next screen.” Once a payment method is selected (“Credit Card” or “Bank Account” or “PayPal”), the form displays a check box where donors may elect to “Add <fee amount> to cover payment processing fees so that the nonprofits in your basket will receive the full <donation amount> donation.” Note that, at present, donors are not able to cover the $0.93 check processing fee.