When you move in you should be given a list of everything in the property belonging to the landlord and its condition. This is called an inventory. You should check that every item on list is there and you should note any damage such as cigarette burns on the carpet or chipped paintwork. If you have a camera with a date facility, you could record any damage. Once the list is agreed, sign it before returning it to the agent or landlord and make sure you all keep a copy. When you move out, the contents will be checked against the list and the cost of repairing damage or replacing missing items will be taken from your deposit. Normally, the list will be checked when the last person moves out. The landlord cannot keep back your deposit to cover the cost of normal "wear and tear" although there might be different views on what "wear and tear" is.
Before you move in check that the landlord or agent has given you the following documents: