| ACPO | Association of Chief Police Officers |
| ACRO | Association of Chief Police Officers Criminal Records Office |
| APLE | Action Pour Les Enfants |
| APP | Authorised Professional Practice |
| CEOP | Child Exploitation and Online Protection Command |
| CIS | Council of International Schools |
| COBIS | Council of British International Schools |
| COUK | Children Outside the UK (IICSA investigation) |
| CRI | Child Redress International |
| DBS | Disclosure and Barring Service |
| DFID | Department for International Development |
| ECPAT | Every Child Protected Against Trafficking |
| FCO | Foreign and Commonwealth Office |
| FTO | foreign travel order |
| HMPPS | Her Majesty’s Prison and Probation Service |
| HOSOL | Home Office’s Serious Offence List |
| ICPC | International Child Protection Certificate |
| ILO | international liaison officer |
| KISS | Kiddies Support Scheme |
| MAPPA | Multi-Agency Public Protection Arrangements |
| MoJ | Ministry of Justice |
| MOSOVO | Managing Sexual Offenders and Violent Offenders |
| NCA | National Crime Agency |
| NCA-CEOP | National Crime Agency’s Child Exploitation and Online Protection Command |
| NGO | non-governmental organisation |
| NPCC | National Police Chiefs’ Council |
| PNC | Police National Computer |
| PREDA | People’s Recovery, Empowerment and Development Assistance Foundation |
| RMP | Royal Military Police |
| ROA | Rehabilitation of Offenders Act 1974 |
| RSHO | risk of sexual harm order |
| RSO | registered sex offender |
| SHPO | sexual harm prevention order |
| SOA | Sexual Offences Act 2003 |
| SOPO | sexual offences prevention order |
| SRO | sexual risk order |
| TCSO | transnational child sex offender |
| UNCRC | United Nations Convention on the Rights of the Child |
| UNICEF | United Nations Children’s Fund |
| ViSOR | Violent and Sex Offender Register |