Is this text message from the court?

Obviously, this is not the case.

If the other party has filed a lawsuit in court, the court will directly send you a notice of response, which will be on paper and stamped with an official seal. Moreover, although this text message seems rigorous, it is actually full of loopholes. It is impossible for the court to implement litigation preservation measures such as seizing and freezing property before accepting the case. It is this that exposes the other party's falsehood. Furthermore, even if the court accepted the case, it would not send a notice using such an anonymous code, and there would still be a notice without any substantive content.