The adjudicator works on the basis that the deposit is the tenant's money therefore the onus in on the party submitting a claim on the deposit to provide evidence to support their claim.
Please note that TDS take all evidence at face-value, and we are not investigative in our approach.
For detailed information read our guide 'How to present your case to the TDS adjudicator'. This can be found under the heading Help Centre on our website. Click on 'Guides'