You are 100% guaranteed to receive your own placenta capsules. I have various measures in place to always ensure this.
I limit the number of bookings I take per month, so I typically only have one placenta in my possession at a time. If by chance I have more than one, they are always stored separately and I only ever work with one placenta at a time. I also have numerous full sets of equipment to ensure each placenta has its own designated equipment from start to finish.
The Placenta Kit also ensures all placentas are ID labelled when I receive them and remain so until completion.