Mexican newspaper El CEO citing documents said Credit Suisse is owed over $100 million by Credito Real, which has begun bankruptcy proceedings over $2.6 billion in debts.
That is the largest debt Credito Real owes to a foreign bank, the newspaper reported.
"Credit Suisse has no material exposure to the company in question," a spokesperson told Reuters on Saturday.
"Any suggestion otherwise is unfounded."
Credito Real announced it was beginning bankruptcy proceedings in July after defaulting earlier in the year.
(Reporting by John Revill; editing by Jason Neely)