Yale Notary
Yale Notary Introduction
People usually have notary at UPS or some places. But it charges a little around $10 or more.
Notary services are available free of charge to Yale students, staff, or faculty members at the Central ID Center.
https://idcenter.yale.edu/services/notary
It is easy to book an appointment at the website and the here are always enough slots. (I think walk in is also available.
They also support other services such as passport photo.