Methods Protocol and registration: This protocol is based on the enhancements recommended for scoping reviews provided by the Joanna Briggs Institute (JBI) scoping review methods manual (Peters, Godfrey, McInerney, Munn, Tricco, and Khalil, 2020) and follows the Preferred Reporting Items for Systematic reviews and Meta-Analyses extension for Scoping Reviews (PRISMA-ScR) Checklist (Peters et al, 2020). The final scoping review will follow the Preferred Reporting Items for Systematic Reviews and Meta-Analysis extension for Scoping Reviews (Peters et al, 2020). The protocol preprint will be made available on the Open Science Framework. The review will commence, after this protocol is submitted, and is anticipated to be completed by December 2020. There is no known previous scoping review of the SPI for effectiveness with CYP. Eligibility criteria: The criteria are indicated below using the Population, Concept and Context (PCC) framework as the The Joanna Briggs Institute Reviewer's Manual (2020) recommends that the PCC can be used to construct scoping reviews questions, as it is a less restrictive alternative to the PICO (Munn et al, 2018). Population (P): Children and young people (CYP) aged up to 18 years with suicide ideation/behaviour will be eligible, as this is the age range for CAMHS. Also studies that include participants with ages outside this range will be included if there is a subgroup analysis that contains CYP aged between 12 and 18 years. Concept (C): The concept of safety planning as an intervention has been defined as safety planning, coping plans or crisis plans for suicide prevention. The SPI as a treatment intervention even if it is part of a wider intervention. This broad concept has been included so all SPI treatment interventions can be explored. Context (C): The SPI will be described in relation to context such as the specific intervention used, the wider intervention, any outcome measures, and any groups or sub group of CYP identified. Studies will be eligible if published within the last 12 years (2008–2020 inclusive) to capture recently conducted and reported trials since Safety Planning Intervention was introduced in 2008 (Stanley and Brown, 2008). Only studies published in English will be included for feasibility. Trials from any country or setting will be eligible. Information sources: The review will locate and include studies using a search strategy applied to MEDLINE (Medical Literature Analysis and Retrieval System), CINAHL, PsycINFO, the Cochrane Central Register of Controlled Trials, ASSIA, British Education Index, Australian Education Index and GOOGLE SCHOLARS. Search: The search strategy was collaboratively developed by the team of authors (SAS, NK, ND, JD) who are experienced with database search strategies and, also with consultation with an experienced research librarian (SM). The search strategy development was informed by a clinical understanding by the main author (SAS) and then the language used within this area and referring to the MeSH (Medical Subject Headings) terms. The electronic search string is identified below. juven* OR youth OR young person OR young adul* OR teen* OR adolesc* OR child* OR young people and "suicid* intervention" OR "suicid* prevent*" OR "suicid* reduction" OR "safety plan" OR "safety planning" OR "safety plans" or "crisis plan*" or "coping plan*" The proposed search strategy was also reviewed by the co-authors (NK, ND, JD) and the final search strategy was agreed by all. Selection; The terminology will be applied to the text words contained in the title, abstract, and keyword headings from a sample of relevant articles identified from informal literature searching. The reviewer will screen titles and abstracts to assess eligibility. Studies selected will be imported into Endnote (version x9) and screened against the inclusion criteria of reports using any study design that focus on suicide interventions which relate to safety planning, crisis planning or coping planning intervention. Duplications will be removed at this stage. Data charting: All studies included in the full-text screening will undergo data charting using a standardised charting form developed using the format from the JBI. The following data will be charted: publication identifiers (eg, journal, year, first author), study characteristics (eg, participant age group, gender, ethnicity, total sample size, intervention type, methodology (eg quantitative/qualitative, study design, measures used, data collection, outcome) and then any recommendations. Analysis of the evidence After data charting, the identified outcomes of the search will be evaluated in an appropriate manner that will be dependent upon the outcome of the evidence obtained and this will be in a manner which follows the a transparent manner and justifying the approach taken. The researchers plan to report the outcomes around intervention effectiveness and any other main findings and making recommendations as well. As this is a scoping review, there will not be a conduct risk of bias assessments or quality appraisals of included sources. This approach is consistent with the Joanna Briggs Institute Reviewers Manual (2020). Contact details for further information; Susan.abbott-smith@nhslothian.scot.nhs.uk