I have never heard of anyone putting already sowed seeds into cold storage. Cold and wet is likely to just rot them - isnt it?

If your seed variety requires stratification for a specified length of time, and you have the refrigerator space, sure you can do it. However if you have old dead seed it will not bring them back to life. Al

Mandolls - check 'stratify'. It's the practice of putting moist seeds into a cold environment to break dormancy, and a requirement for many things although not usually for the seeds mentioned above.

I don't know if it would kick start sujiwans older seeds though - always a chance and it doesn't hurt anything but a little refrigerator space occupied to try.