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To clarify Mustafa, we have already paid the 3rd party lender, as we recognise that the undertaking is a legally binding contract. I am sorry for not clarifying this in my original post.
I fail to see how we have been negligent when it is not us who were due to pay the �8000, it was the borrower. He was the one who failed to pay the 3rd party lender and, consequentially, we have, without arguement, settled the matter amicably with this lender and now seek to recover our debt.
Our arguement is; that the client did not fulfill his agreement (this is provable via written and recorded telephone contact with both us and the 3rd party lender) to pay the �8000 and, as a consequience, we have had to discharge his debt. The debt is still his in our eyes, just owed to us now instead.
We seek to secure this debt by way of a Unilateral notice, unless somebody on here has an improved method of recovery.
I am not bothered how or when this client repays us, just that it is secured on his property to protect our interests.
I hope that this provides more of an insight to any learned readers.
Many thanks