Accounting for disbursements

I have paid for translation service on behalf of my client for which I will be reimbursed by him in a future when he pays my invoice. The amount of the translation fee are not included in my invoice as this is not part of the turnover. I had to post the cost directly to a nominal ledger 1100 (CREDIT bank DEBIT debtors). In this case the amount is on debtors account but not linked to a client. Is there a different way to do this so I could link payment to client?
Many thanks,