One way to tell if someone is legitimate on a dating platform is by looking at how much information they’ve provided about themselves in their profile page; generally speaking it should be fairly detailed (including pictures). You may also want to look into whether or not the person has verified his/her account through email address verification - this adds another layer of security since it confirms that the user actually owns the email address associated with them on said website/app . Additionally, some websites will even perform background checks prior to allowing members onto its platform – these services typically require payment but can give peace-of-mind when meeting up offline after connecting online first via said service provider's website/app.