I would like to write the name of the SOFER and/or the quality/ andor price/and or date of purchase of MEZUZAH on the case ( on the underside of the case not shown to the PUBLIC) as a marker or indication for me at a later date. Is this permissible? It sounds like a strange question, but one might not be aware of such an HALACHA? The Sofer did attach a sticker to the underside of MEZUZAH CASE with his name, shoud the sticker be removed? THANK YOU GOOD CHODASH
While there is an issue with writing on the mezuza itself, I am not aware of any issue with writing on the mezuza case, whether on the inside or the outside of the case.