Use zero value cryostorage contracts to document the storage of samples on a contract.
Zero value contracts issue invoices that are kept for record-keeping purposes on the patient's profile, but that are not shared with patients.
To create a zero value cryostorage contract, create an invoicing strategy for which Fee, per patient/sample/fixed price is marked as 0.00. This invoicing strategy can then be applied when creating a contract for a patient.