PWN or Prior Written Notice is a procedure used by IEP staff to inform the family of the rights they are willingly not exercising.
That being the right to participate and get help from the district on the IEP plan the SWD (student with disability) is eligible for.

Your districts staff should already have local procedures for this to follow.

Districts should check with SELPA if they have questions about their own local SELPA policy in this regard.

PWN is important for documenting the reason a SWD is not participating in case the question of why they are not participating comes up later.

Whenever students are made inactive in SIRAS as 'Cessation of Services' or 'Withdrawal' the PWN must be documented.

Along with this documentation, the stopping of participation needs to be reported to CALPADS in the form of a SWDS record.

Making the record correctly inactive in SIRAS, while using the date the written PWN is received by the district is crucial to this step.

Once the current status of the record is Inactive in SIRAS, we would 'archive' the MIS page to create the transaction to reflect this new status.

If there is no PWN being done at the time a student 'stops getting services' then most likely the student is just moving and is not 'Cessation of Services'.

Literally stopping services due to moving is not what we mean by 'Cessation of Services'.

In this case the family did not reach out to the district in any way to signal they didn't want to participate any more while they are still living in the district and attending private school.

Or even stopping participation while still enrolled at the public school.