The apostrophe is still in the wrong place in post #1. Please don't edit post #1 again or this thread will get very confusing. Please write your original sentence again in a response.
It's grammatical now. However, if the card belongs to the person being addressed, consider saying "Show me your identity/ID card" instead. Otherwise, you can combine the two sentences as "If you don't show me your ID card, I'll arrest you."