NPower have sent me a bill for 0.13pence. Whats the cheapest way for me to pay

@p_i123 (486)
India
October 11, 2006 5:29am CST
NPower have sent me a bill for 0.13pence. Whats the cheapest way for me to pay and most expensive for them/? his bill covers a property I lived in 5 years ago! The bill has just been sent to me. I want to pay, but also to make sure it costs them more money than my 13pence.
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