The antonyms of "are receipt of" can include "lack of," "dismissal of," "absence of," or "nonexistence of." These words convey the opposite meaning of receiving something, indicating the absence of receipt or dismissal. For instance, if someone does not receive a receipt for a purchase, they might say they have a lack of receipt. Similarly, if a document is dismissed or rejected, the receiver might say they have a dismissal of receipt. In summary, the antonyms of "are receipt of" indicate the non-existence or denying of receiving something, while the opposite term means receiving something.