The government must ensure Britain's financially excluded communities continue to have access to the Post Office network, the National Consumer Council (NCC) has warned.
The consumer body claims that 24 million people in the UK rely on Post Office access for essential financial services, including bank accounts and pensions withdrawal.
Britain's remaining Post Offices provide "much valued services to vulnerable people", spokesperson Nicola O'Reilly stressed.
Alistair Darling, trade and industry minister, is expected on Thursday to announce the closure of 2,500 Post Offices.
But scaling down the Post Office presence in the UK could have serious implications for customers with constrained mobility, or who live in rural areas where transport is scarce, the NCC has warned.
Any government decisions on the future of the UK's Post Offices must take into account the problems for customers who will not have easy access to bank accounts on the high street or online.
Post Office numbers have halved in the last 20 years from around 22,000 branches in the early 1980s.
Find out more about Post Office savings accounts
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