I once switched jobs because my old job was stringing me along for a raise I knew they wouldn’t give. Found a new job that happened to be seasonal (but started at the beginning of the season). Worked throughout the whole season and then filed for temporary unemployment through the off season.

Due to some clerical error, my unemployment was being paid by my old job, not my new one, despite having been at the new job long enough for them to be the ones paying.

My old job (rightfully) disputed it and myself and my old boss had to go to the local unemployment office for a hearing.

Very little of the process was handled over the phone. All communications were via mail.

The hearing wasn’t a bad experience at all. Me and my old boss sat opposite at a table in the clerk’s office. She heard both our sides, asked a few questions, and then filed whatever she needed to for my new company to be the ones paying.