In December 2022, the European Parliament (EP) abruptly caught full media attention due to allegations of interference from third countries, mainly Qatar and Morocco, and misconduct of several MEPs. Subsequently, this so-called Qatargate scandal became a watershed moment concerning integrity issues in the EP. This research intends to clarify how individual MEPs addressed transparency, integrity, accountability and anti-corruption themes in the period 2019-2024. By content-analysing the collection of parliamentary questions of the EP´s 9th legislature, we offer information about the EU parliamentarians’ fears of corruption in terms of the actors addressed in their written questions, e.g., third countries, particular Member States or EU bodies, and the policy issues covered. We also study under what conditions MEPs talk about integrity themes, testing hypotheses on their party ideology and their populist versus mainstream condition. Our findings nurture diverse theoretical debates on the links between anti-corruption concerns and the quality of democratic governance both in the Member States and at the EU level.