Checking with is an action of verifying something through consultation or investigation. Some of the antonyms for checking with are ignoring, neglecting, avoiding, overlooking, and trusting blindly. Ignoring means to pay no attention or to disregard something. Neglecting is to fail to care for or to pay attention to something. Avoiding is to keep away from something or to elude or shun it. Overlooking means to fail to notice or to see something. Trusting blindly is to accept something without questioning or inspecting it. It is essential to use the opposite words of checking with in the right context to avoid misunderstandings and miscommunication.