A quick definition of in ipso termino:

Term: in ipso termino

Definition: In ipso termino means "at the very end" or "on the last day" of a specific period of time. This term is often used in legal contexts to refer to the deadline for completing a task or meeting a requirement. For example, if a contract states that payment must be made within 30 days of the invoice date, the payment must be received in ipso termino, or on the 30th day after the invoice date.