Originally Posted by Paul_s
He was served papers too at his home address, so doubt it's a scam. In any case he'll need to get advice from a lawyer (which is usually free at first contact - at least he can get some 'advice' with how to proceed).
Don't know if they have the equivalent in Sweden, but in the UK we have the Citizens Advice Bureau. It's Government run and gives free legal advice. If you have the equivalent in Sweden, that's where I'd go before going to a solicitor etc.