At Snapchat the content from publishers is moderated and curated by human editors which limits the potential of disinformation.
SnapChat's misinformation policies state that they do not allow:
"Pretending to be someone you’re not — this includes your friends, celebrities, brands, or other organizations — or attempting to deceive people about who you are is not allowed.
We prohibit spam and other deceptive practices, including manipulating content for misleading purposes or to imitate Snapchat content formats
We prohibit spreading false information that causes harm or is malicious, such as denying the existence of tragic events, unsubstantiated medical claims, or undermining the integrity of civic processes"