Contact details are telephone numbers and e-mail address of patient together with any comments regarding this data (e.g. "mother's phone number"). Here you can also select by which channels the patient wishes to receive notifications of visits (SMS, e-mail), if the patient wants to receive any notification. Fill in the contact information is not mandatory, but if a patient wishes to receive notification via SMS, the mobile phone number will become mandatory and by analogy, if the patient wishes to receive notification by e-mail, then entering e-mail address will be mandatory. If by the two channels, then entering either the phone number as the e-mail address will be required. Also within contact data one can mark whether patient wishes to have access to internet registration (internet registration gives possibility to patient for arranging visits himself). Marking this option one also has to enter patient e-mail address, which will be used as his login for internet registration. If option “Access to internet registration” is marked, then while saving patient data there will be password for internet registration automatically generated and sent to patient e-mail address. When entering a mobile phone number, it automatically selects the "SMS" option and when entering an email address, the "E-mail" option in the "Sending notifications of visits" field (this check can obviously be deleted, the system only suggests the option of sending notifications).