Amazon.com Inc. will get a formal antitrust complaint from European Union regulators as soon as next week, according to a person familiar with the case who spoke on condition of anonymity.

Issuing a so-called statement of objections would ramp up a probe into the potential misuse of merchants’ data on the online sales platform.

The move raises the risk of fines as it lays out the EU’s evidence in the probe opened last year into how Amazon handles data of smaller sellers that it also competes against when it offers products.

The Wall Street Journal earlier reported that the EU would send a statement of objections next week or the week after. Amazon declined to comment. The European Commission didn’t immediately respond to a request for comment.