according to https://oaspa.org/principles-of-transparency-and-best-practice-in-scholarly-publishing/ by
1. Peer review process
2. Governing Body
3. Editorial team/contact information
4. Author fees
5. Copyright
6. Identification of and dealing with allegations of research misconduct
7. Ownership and management
8. Web site
9. Name of journal
10. Conflicts of interest
11. Access
12. Revenue sources
13. Advertising
14. Publishing schedule
15. Archiving
16. Direct marketing
non fake conferences
1. give you a defined topic to talk about
2. offer to pay your travel cost
3. have a backup by a major scientific organization
4. you know the person who is inviting you
5. as well as the chairmen of the session