Hey, I'm rich!

Amazon sent me a credit note for 1 penny:

CREDIT NOTE
Credit Note Date: 03/09/13
Credit Note Number: EUVINS1-VCN-GB-9286733
Original Order Number: 203-8901334-6791512
Supplier Name: Amazon EU S.a.r.L.
Supplier Address: 5 rue Plaetis, L-2338, Luxembourg
Supplier VAT number: GB727255821
Customer Name:[ XXX]
Customer Ship To Address:[XXX]
Customer Bill To Address:[XXX}

Qty	Item	Unit Price (VAT Exclusive)	VAT Rate	VAT	Total Price (VAT Inclusive)
1	[XXX] - Season 1 [DVD] [2013]	-£0.01	20.00%	£0.00	-£0.01

TOTAL: -£0.01

Now, what should I spend it on?