Is Oxfam international trustworthy for people that know about economy?

So I'm doing research on multiple NGOs because I've decided to start donating. And Oxfam, with its provocative claims and promising ideas, looks like a great charity. But I've also read about how they have a history making up results on their reports. Are these reports actual information that economics recognize? Or are they just propaganda to trick people into thinking wealth inequality is higher than expected?