In addition, if the applications deadline is missed, users could face seeing all their payments stopped.
The charity insists that some of the most vulnerable people in the country will come under this category, with the majority seeking financial support for housing, half claiming tax credits and a third claiming disability benefit.
To support them, The Trussell Trust is recommending that the government expands Universal Support and moves people on to the system rather than leaving them to make their own claim.
“We created our benefits system in this country to free people from poverty, not lock them into it,” said Emma Revie, The Trussell Trust chief executive.
“As we look at the current plans for the next stage of Universal Credit, we’re really worried that our network of foodbanks could see a big increase in people needing help.
“Now is the time for our government to take responsibility for moving people currently on the old system over, and to ensure no one faces a gap in payments when that moves happens. Universal Credit needs to be ready for anyone who might need its help, and it needs to be ready before the next stage begins.”
Work and Pensions Secretary Esther McVey used her Conservative Party Conference speech earlier this week to dismiss any notion that her party has implemented benefits cuts as “fake news”.
She also awarded Citizens Advice £39 million to assist with the Universal Credit roll-out.
“We welcome the opportunity to provide even more people with the help they need with Universal Credit, and deliver a consistent service through the Citizens Advice network across England and Wales,” said the charity’s chief executive Gillian Guy.
“Delivering this service will give us even greater insight into the Universal Credit system. We’ll continue to share our evidence with the government to help make sure Universal Credit works for everyone.”