Can the lender request a payment due to errors after I sold a property that was on mortgage

Hi,

I recently sold a property that was under a mortgage. I requested a mortgage liability letter which was issued on 24 May.

This was settled by the buyer's mortgage lender and my mortgage clearance letter was issued on 06 June. The property sale was completed on 16 June.

My old lender has now (29 June) requested another payment to cover 'errors' that have surfaced in their account booking procedure. Can they do this?

Thanks

M. M.