I'll try to keep it short...basically, we did some work for a regular customer 8 months ago. He'd always paid on collection and we never had any problems with him. However, since doing the work 8 months ago, he's now started using another company and has decided he needn't pay us for the work we did. We have been chasing him constantly with no resolution and now all efforts of communication are being ignored. He runs 4 businesses, for which we have the addresses of all 4. The work was actually for 2 of the businesses but he's since sold one of the businesses, and we've previously written to all 4 addresses AND his accountants address (where his new ltd company is registered), and have had zero reply. The letters we sent were 7 day notices and we now wish to issue a court claim for each of the invoices he owes (one was due from a business he co-owns and one from a business a owned alone then sold). So, for the business he co-owns, can we issue the court claim to the business address that the work was for or do we need to find his personal address? Also, can we issue the claim to both proprietors of the business or just the one we had dealings with? Where can I issue the claim for the other job to? Can I do that to the same business address as his 'last known address'? At the time of us doing the work his businesses were sole trader/partnerships.