Seizures of epilepsy can begin at any age and in any person.
If you are not talking about a single seizure, but about several, then most likely the person has epilepsy. Even with a single seizure, it is important to seek the advice of an epileptologist.
Yes, Alexey, there are such seizures in people who do not have epilepsy. This phenomenon is called pseudo seizures or non-epileptic events.
They are of a psychological nature and are referred to as "psychogenic seizures". These seizures indicate some kind of addiction, need for attention, stress, or certain mental disorders. The fact is that in some patients with epilepsy, in addition to epileptic seizures, psychogenic seizures are observed, but people suffering from pseudo-seizures do not have epilepsy.
The similarity of pseudo-seizures with epilepsy often makes it difficult to diagnose this syndrome, to distinguish it can be very difficult to separate them from each other - this requires a comprehensive medical examination and high medical qualifications.