Xiaomi India did not share the agreement with the bank due to confidentiality reasons, Deutsche told investigators, according to the documents.
A spokesperson for Deutsche Bank declined to comment.
Qualcomm, in a statement, said under "the license with Qualcomm, Xiaomi India pays royalties on all devices sold in India".
In that statement, it said Xiaomi India was an affiliate and one of the Xiaomi Group companies, which entered into a legal agreement with Qualcomm.
Indian authorities do not agree with that and say Xiaomi India only acts as a reseller of smartphones that are made by contract manufacturers.