Credit Cards
I recently had to hire a car and there, they didn’t ask for a deposit but required my credit card details with a declaration that any costs incurred e.g. damage etc. could be taken from the credit card.
There appears to be no reason why, instead of taking a deposit a landlord can’t take a tenants credit card details and at the end of the tenancy deduct from the card any rent, damages etc. from it.
Obviously not all tenants will have a credit card but it may be worth asking the question. The advantages of this system are: