Background: The latest French National Cancer Control Strategy makes improving access to Cancer Screening programs (CS) a public health priority, as inequalities regarding CS uptake persist. From 2020 to 2022, we carried a project to document Interventions Promoting CS Participation (IPCSP) for vulnerable groups, for both breast and cervical cancers. To build up experiential and practical evidence from IPCSP, we used an innovative approach in France called capitalization. Methods: The project aimed at capitalizing, i.e. collecting, documenting and circulating, experiential knowledge from practitioners who implement IPCSP at a local level and followed 6 steps: 1/identify promising IPCSP nationwide; 2/ meet with IPCSP practitioners and users; 3/ document and analyze the key mechanisms impacting how IPCSP unfold; 4/ write a summary form for each IPCSP; 5/ publish them on a online portal; 6/ conduct a cross-case analysis to investigate key or recurring levers and barriers and design recommendations for public policy. Results: 20 IPCSP were selected, including projects aimed at women in low-income neighborhoods, healthcare deserts’ inhabitants, allophone women, handicapped women, etc. Most IPCSP targeted groups, not individuals. Strategies included: outreach strategies, peer prevention, training workshops, on-site screenings, etc. All IPCSP promoted informed choice. The analysis highlights issues regarding implementation design, partnerships, and evaluation. Most IPCSP had to adapt the tools of the national CS campaign. Most IPCSP reached out to women rather than remodel access to regular sites of prevention to facilitate CS uptake. Partnerships, between medical experts and professionals involved with targeted women, provided population-specific and context-specific levers. Fruitful partnerships dedicated time to co-construct interventions and to cross-train practitioners. Conclusions: The selected IPCSP were small-scale programs showing positive results and offering insights for others to put into practice and disseminate strategies recommended in the National Strategy. New research is necessary to measure their cumulative impact on national uptake goals.