Case T-464/17: Judgment of the General Court of 14 December 2018 — TP v Commission (Civil service — Officials — Remuneration — Deduction from salary — Maintenance awarded by a national court in the context of divorce proceedings — Sincere cooperation with the national courts — Circumscribed powers — Article 24 of the Staff Regulations — European Code of Good Administrative Behaviour — Rule of correspondence — Act adversely affecting a person — Claim for compensation — Compliance with the pre-litigation procedure)