Yes. There are no restrictions about cashing one banks check with another. In this case, Wachovia bank would send the check to Wells Fargo for clearance and once they receive from them, Wachovia...
that all depends on weather said check is rubber
Take it to a branch office, speak with Customer Service, and make your suspicions known.
You use either of them after you have written something. It doesn't matter if it's just one sentence or one paragraph. You can still get it checked.