Unfortunately, the library does not have a notary service. Below is some information about the 2 places we are aware of that offer notary services in Corvallis. Your bank may also provide this service at no to low cost, so you may want to check in with them as well.
2397 NW Kings Blvd.
Corvallis, Oregon 9733
922 NW CIRCLE BLVD UNIT 160
CORVALLIS, OR 97330