Related Rule
Netherlands
Practice Relating to Rule 123. Recording and Notification of Personal Details of Persons Deprived of Their Liberty
The Military Manual (1993) of the Netherlands provides:
Upon the outbreak of an armed conflict, each of the Parties to the conflict shall institute an Information Bureau. The Bureau shall be charged with the collecting and the forwarding of information concerning prisoners of war and other protected persons. The Bureau shall also make any enquiries to obtain the desired information about prisoners of war. 
Netherlands, Toepassing Humanitair Oorlogsrecht, Voorschift No. 27-412/1, Koninklijke Landmacht, Ministerie van Defensie, 1993, pp. VII-12/VII-13.
The Military Manual (2005) of the Netherlands states:
0716. As soon as possible after capture, a prisoner of war should be registered. This registration should be reported to the national information bureau (see point 0752). Every prisoner of war must be issued with an identity card showing: surname, first names, rank, registration number and date of birth. This identity card may not be taken away from the prisoner of war. Each party in an armed conflict must provide information about each detainee to its national information bureau (see point 0752).
0740. Relations with the outside world: immediately after capture, on hospitalization and after each move to a different prisoner-of-war camp, a prisoner of war must be given the opportunity to use a capture card to notify the national information bureau and his family about his capture, location and health …
0751. Death of prisoners of war
If a prisoner of war dies in detention, information (notification of death) must in all cases be passed to the information bureau (see point 0752; G III Article 120, Annex IV.D). Where applicable, the protecting power must also be informed. This information should consist specifically of the name, rank, date of birth and registration number, date and place of death, cause of death, date and place of burial, and all particulars necessary to locate the grave. A will of a prisoner of war should be forwarded direct to the information bureau after his death, and possibly also to the protecting power. All particulars of funerals and graves should be registered by a graves service (in the Netherlands the Royal Dutch Army Recovery and Identification Service). 
Netherlands, Humanitair Oorlogsrecht: Handleiding, Voorschift No. 27-412, Koninklijke Landmacht, Militair Juridische Dienst, 2005, §§ 0716, 0740 and 0751.
The manual also states:
If a protecting power is appointed during an armed conflict … it may play a role in the treatment of prisoners of war. Examples might include … sending reports to members of the families of prisoners of war concerning their state of health. 
Netherlands, Humanitair Oorlogsrecht: Handleiding, Voorschift No. 27-412, Koninklijke Landmacht, Militair Juridische Dienst, 2005, § 0714.
In its chapter on peace operations, the manual states: “On capture, persons must be disarmed, searched and registered.” 
Netherlands, Humanitair Oorlogsrecht: Handleiding, Voorschift No. 27-412, Koninklijke Landmacht, Militair Juridische Dienst, 2005, § 1226.