A lot of Court Summons are not actually the real thing. I work in accounts, and have received several "court summons" - but when the correspondance is read correctly, they're quite often fakes! And basically it's threatening that if you dont pay, they'll go all the way. What some suppliers do, is keep photocopies (whether this is legally right or wrong - I'm unsure) - and then send them; if they are lucky the recipient panic pays, including the court & solicitor fees too! If you're certain its a genuine, you could just send payment for the outstanding amount of the invoice, sooner rather than later and keep your fingers crossed they'll let you off with the legal costs! I've got away with this plenty, it may not be very moral, but hey, it's dog-eat-dog out there!