Is there a certain amount of time an employer has to contest unemployment benefits?

I was on a FMLA from work due to my mother being ill. At the end of the 12 weeks I received a letter stating that my time was up and I had a few options. Return to work, quit or remain on an unprotected leave. I called 2 times and had to leave a message stating I wanted to go out on an unprotected leave. Two weeks later I received a letter of termination. I was extremely hurt. I claimed unemployment for two months before the company contested it. I am fighting them due to the fact I took an option they gave me. I was just wondering if there is a time limit a company has to contesting unemployment benefits.