NatWest has apologised to customers following complaints of their money "disappearing" in transfers over their mobile banking app.
The bank said this was due to an error causing a half-hour delay in mobile transfers, and urged customers not to re-send any payments they have already made.
This comes two months after a glitch on the app caused delays for more than eight hours during the Black Friday sales period.
A spokesperson from NatWest said: "We are aware that some NatWest customers are experiencing a short delay in funds leaving or reaching their accounts.
"These payments have been made and should not be re-sent.
"We apologise for any inconvenience caused and are working to rectify the issue as quickly as possible."
