Different rules apply to deposits depending on whether you paid before or after 6 April 2007.
If you paid your deposit before 6 April 2007, you can use this letter.
[Landlord or letting agent address]
Re: Deposits for [your address]
We vacated the above property on [date] and, as requested, returned all sets of keys to your letting agent on the same day.
We have fulfilled all of the contractual obligations set out in our tenancy agreement.
We have paid all bills up to date and no damage has been caused to the property.
We were told that we would receive a cheque for our deposit from you within the week. However, this has not arrived.
We would appreciate it if you could:
1. Send a cheque for the deposit for [£…] to [name] at [address] within the next 5 working days.
2. Write to us to explain exactly why you are withholding our deposit. Please detail any financial loss you feel you have suffered and enclose receipts or estimates for any work that has been done/that you consider needs doing.
If we do not hear from you within five working days, we shall assume that you are withholding our deposit unfairly and will therefore be applying to the small claims court to recover our money.