“Hecce”: “. . . but the elders are not following procedure by inviting him to a JC without going thru the previous step of the conversation with two elders.”
“cofty”: “There is no judicial unless there is a confession or two witnesses.”
Those are both certainly valid points, which should be acknowledged. In fact, at least according to the details provided by the original poster (Mr. López / “sp74bb”), the standard procedure of the Watch Tower organization for initiating a judicial proceeding and forming a committee seems to have not been followed by this evidently errant local body of elders.
This consideration of the validity of the manner in which the judicial process was initiated is a separate issue from the propriety of sending a request to attend (like an amateur “summons”) in the mail, as well as the part in the letter asking whether Mr. López wishes to basically disassociate himself from being one of Jehovah’s Winesses, which is also contrary to the direction in the elders’ Shepherd the Flock manual.
If the legitimately-established protocols from Watch Tower had been followed before the elders’ letter was sent, then that letter would have been fine – except, of course, for the part asking if Mr. López wished to disassociate at that time. But, as it is, the timing of such a letter advising of a specific date for a judicial trial was inappropriate due to the lack of the steps required beforehand, as noted by “Hecce” and “cofty” above.