Do I need a valid future departure date on my departure card when applying for a visa extension in Thailand?

Something i am curious about, we have to a show a departure card when applying For visas, i havent come accross the poroblem as yet, should it be a valid departure card, as in an actual exit date, in the future, as my depsrture card was for december last year, or is that still ok? I am assuming the fact that there is the relevent money in the bank that its enough to show affirdability to leave. i am on a non 0 90 days and am applying for a 12 month extension,

Hope this makes Sence,