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Hello, this is Jim, a dual-qualified lawyer (UK & Republic of Ireland) and happy to help you today.
Yes, considering by law the deposit needs to be returned to you within 10 days of leaving - you can ask them why there was an 8 week delay and ask for proof of the property being vacant during that time - in the meantime tell them you will have to defend a claim if they make one against you. I can help you reply to the court proceedings if they issue a small claim against you.
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