Riley Keough is trying to fight off a debt collector from across the pond, which she claims wants her to cough up a lot of money for a house her late mother owned ... but Riley's pushing back.
Lisa Marie Presley's eldest child -- who's now in charge of the trust left behind after her mom's death last year -- just filed new legal docs asking for a judge to declare she's not on the hook for a fat tab that a bank is attempting to collect from the trust.
In the filing, obtained by TMZ, Riley notes this all has to do with an estate in Rotherfield called Coes Hall -- an 11-bedroom property that LMP brought back in 2010 ... and which she secured with a loan from Barclays Bank.
To make it simple ... Barclays is claiming Lisa owed an outstanding balance of about $1.6 million on Coes Hall -- and the bank claims Lisa personally guaranteed payment when she took out the loan. In the wake of her death, though, Barclays is trying to have the trust pick up the tab for the personal guarantee.
But RK is calling BS ... in her paperwork, she says there are at least 2 reasons why she shouldn't have to pay the debt -- for starters, she says a key statute of limitations has run.
Riley claims Barclays had a deadline to file any kind of claim on this -- namely, Jan. 12, 2024 ... the 1-year anniversary of Lisa's death ... which has come and gone without the bank filing legal papers. She also claims Lisa only guaranteed interest payments on the loan between 2010 and 2015, so the trust shouldn't have to pay down the outstanding principal.