I've gotten vested shares for a few years, but I don't remember having to "accept" the award. As part of the acceptance, there's a section on not working for companies that provide similar services to Fiserv, and not doing work similar to the work that you did at Fiserv. This isn't attached to the vested shares directly, it's just a section that basically says "if you accept these shares, you agree to the following".
It's pretty underhanded to try to slip a non-compete into a bonus. I feel like this is new for this year, can anyone confirm? You have 120 days to accept the bonus before it's automatically rejected.