Where a deduction (or number of deductions) means the claimant is left without enough money to live on, then they can ask for the deduction to be reduced.
Depending on what the deduction is for the DWP can reduce the amount of the deduction.
The claimant will need to show the DWP that the deduction/s is/are causing them financial hardship.
They will probably be asked to give a financial statement which explains why they can't meet their basic living costs with the current rate of deduction/s in place.
Telephone: 0800 916 0647
Or write to:
Debt Management (C)
Mail Handling Site A
Landlords can also contact the Debt Management Team.
Information on the Debt Management Team and their customer service standard on gov.uk here.
If a representative contacts the Team on behalf of a claimant they will need to provide explicit authorisation to act on their behalf.
Where the deduction is to a third party (eg for council tax arrears or rent arrears) the amount being taken cannot usually be reduced (although for rent arrears where the deduction is above an amount equal to 10% of the claimant's standard allowance, then the DWP do have the discretion to reduce the deduction to this level).
More on Third Party Deductions for rent arrears on this page.