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20250401_rev01 · COMPARED WITH 20250302_rev01 · ARCHIVE SNAPSHOT, DATE APPROXIMATE
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| 1 | [Internet Security Research Group (ISRG)](https://www.abetterinternet.org/) is the non-profit entity that operates the Let's Encrypt Certificate Authority. Some policies that apply to Let's Encrypt are ISRG policies, some are specific to Let's Encrypt. | |
| 1 | Let's Encrypt is a free, automated, and open Certificate Authority brought to you by the nonprofit [Internet Security Research Group (ISRG)](https://www.abetterinternet.org/). Read all about our nonprofit work this year in our [2024 Annual Report](https://www.abetterinternet.org/annual-reports/). | |
| 2 | 2 | |
| 3 | ## Let's Encrypt Subscriber Agreement | |
| 3 | Legal Address | |
| 4 | 4 | |
| 5 | - [v1.5, February 24, 2025](https://letsencrypt.org/documents/LE-SA-v1.5-February-24-2025.pdf) | |
| 6 | - [U.S. Government Amendment, September 22, 2015](https://letsencrypt.org/documents/LE-USG-SA-Amendment-Sept-22-2015.pdf) | |
| 7 | - [U.S. State and Local Government Amendment, December 28, 2016](https://letsencrypt.org/documents/LE-US-State-Local-SA-Amendment-Dec-28-2016.pdf) | |
| 5 | 548 Market St, PMB 77519 | |
| 6 | San Francisco, CA 94104-5401 | |
| 7 | USA | |
| 8 | 8 | |
| 9 | - [Differences Between v1.4 and v1.5](https://letsencrypt.org/documents/LE-SA-v1.5-February-24-2025-diff.pdf) | |
| 10 | - [v1.4, April 3, 2024](https://letsencrypt.org/documents/LE-SA-v1.4-April-3-2024.pdf) | |
| 11 | - [Differences from v1.3 to v1.4](https://letsencrypt.org/documents/LE-SA-v1.3-v1.4-diff.pdf) | |
| 12 | - [v1.3, September 21, 2022](https://letsencrypt.org/documents/LE-SA-v1.3-September-21-2022.pdf) | |
| 13 | - [Differences from v1.2 to v1.3](https://letsencrypt.org/documents/LE-SA-v1.2-v1.3-diff.docx) | |
| 14 | - [v1.2, November 15, 2017](https://letsencrypt.org/documents/LE-SA-v1.2-November-15-2017.pdf) | |
| 15 | - [Differences from v1.1.1 to v1.2](https://letsencrypt.org/documents/LE-SA-v1.1.1-v1.2-diff.docx) | |
| 16 | - [v1.1.1, August 1, 2016](https://letsencrypt.org/documents/LE-SA-v1.1.1-August-1-2016.pdf) | |
| 17 | - [Differences from v1.0.1 to v1.1.1](https://letsencrypt.org/documents/LE-SA-v1.0.1-v1.1.1-diff.docx) | |
| 18 | - [v1.0.1, July 27, 2015](https://letsencrypt.org/documents/LE-SA-v1.0.1-July-27-2015.pdf) | |
| 9 | Send all mail or inquiries to: | |
| 19 | 10 | |
| 20 | ## ISRG Combined Certificate Policy and Certification Practice Statement | |
| 11 | PO Box 18666 | |
| 12 | Minneapolis, MN 55418-0666 | |
| 13 | USA | |
| 21 | 14 | |
| 22 | - [v5.7, January 15, 2025](https://letsencrypt.org/documents/isrg-cp-cps-v5.7/) | |
| 23 | ||
| 24 | - [v5.6, December 12, 2024](https://letsencrypt.org/documents/isrg-cp-cps-v5.6/) | |
| 25 | - [v5.5, October 25, 2024](https://letsencrypt.org/documents/isrg-cp-cps-v5.5/) | |
| 26 | - [v5.4, September 27, 2024](https://letsencrypt.org/documents/isrg-cp-cps-v5.4/) | |
| 27 | - [v5.3, March 22, 2024](https://letsencrypt.org/documents/isrg-cp-cps-v5.3/) | |
| 28 | - [v5.2, February 7, 2024](https://letsencrypt.org/documents/isrg-cp-cps-v5.2/) | |
| 29 | - [v5.1, May 16, 2023](https://letsencrypt.org/documents/isrg-cp-cps-v5.1/) | |
| 30 | - [v5.0, May 5, 2023](https://letsencrypt.org/documents/isrg-cp-cps-v5.0/) | |
| 31 | - [CP v3.4, March 10, 2023](https://letsencrypt.org/documents/isrg-cp-v3.4/) | |
| 32 | - [CPS v4.5, March 10, 2023](https://letsencrypt.org/documents/isrg-cps-v4.5/) | |
| 33 | - [CPS v4.4, September 28, 2022](https://letsencrypt.org/documents/isrg-cps-v4.4/) | |
| 34 | - [CP v3.3, May 6, 2022](https://letsencrypt.org/documents/isrg-cp-v3.3/) | |
| 35 | - [CPS v4.3, May 6, 2022](https://letsencrypt.org/documents/isrg-cps-v4.3/) | |
| 36 | - [CP v3.2, December 22, 2021](https://letsencrypt.org/documents/isrg-cp-v3.2/) | |
| 37 | - [CPS v4.2, December 22, 2021](https://letsencrypt.org/documents/isrg-cps-v4.2/) | |
| 38 | - [CP v3.1, August 20, 2021](https://letsencrypt.org/documents/isrg-cp-v3.1/) | |
| 39 | - [CPS v4.1, August 20, 2021](https://letsencrypt.org/documents/isrg-cps-v4.1/) | |
| 40 | - [CP v3.0, July 19, 2021](https://letsencrypt.org/documents/isrg-cp-v3.0/) | |
| 41 | - [CPS v4.0, July 19, 2021](https://letsencrypt.org/documents/isrg-cps-v4.0/) | |
| 42 | - [CP v2.7, June 8, 2021](https://letsencrypt.org/documents/isrg-cp-v2.7/) | |
| 43 | - [CPS v3.3, June 8, 2021](https://letsencrypt.org/documents/isrg-cps-v3.3/) | |
| 44 | - [CPS v3.2, April 20, 2021](https://letsencrypt.org/documents/isrg-cps-v3.2/) | |
| 45 | - [CP v2.6, April 2, 2021](https://letsencrypt.org/documents/isrg-cp-v2.6/) | |
| 46 | - [CPS v3.1, April 2, 2021](https://letsencrypt.org/documents/isrg-cps-v3.1/) | |
| 47 | - [CP v2.5, October 27, 2020](https://letsencrypt.org/documents/isrg-cp-v2.5/) | |
| 48 | - [CPS v3.0, October 27, 2020](https://letsencrypt.org/documents/isrg-cps-v3.0/) | |
| 49 | - [CPS v2.9, July 14, 2020](https://letsencrypt.org/documents/isrg-cps-v2.9/) | |
| 50 | - [CPS v2.8, May 28, 2020](https://letsencrypt.org/documents/isrg-cps-v2.8/) | |
| 51 | - [CP v2.4, January 21, 2020](https://letsencrypt.org/documents/isrg-cp-v2.4/) | |
| 52 | - [CPS v2.7, January 21, 2020](https://letsencrypt.org/documents/isrg-cps-v2.7/) | |
| 53 | - [CP v2.3, July 3, 2019](https://letsencrypt.org/documents/isrg-cp-v2.3/) | |
| 54 | - [CPS v2.6, July 3, 2019](https://letsencrypt.org/documents/isrg-cps-v2.6/) | |
| 55 | - [CPS v2.5, November 14, 2018](https://letsencrypt.org/documents/isrg-cps-v2.5/) | |
| 56 | - [CP v2.2, September 20, 2018](https://letsencrypt.org/documents/isrg-cp-v2.2/) | |
| 57 | - [CPS v2.4, September 20, 2018](https://letsencrypt.org/documents/isrg-cps-v2.4/) | |
| 58 | - [CPS v2.3, May 4, 2018](https://letsencrypt.org/documents/isrg-cps-v2.3/) | |
| 59 | - [CPS v2.2, March 10, 2018](https://letsencrypt.org/documents/isrg-cps-v2.2/) | |
| 60 | - [CP v2.1, February 6, 2018](https://letsencrypt.org/documents/isrg-cp-v2.1/) | |
| 61 | - [CPS v2.1, February 6, 2018](https://letsencrypt.org/documents/isrg-cps-v2.1/) | |
| 62 | - [CP v2.0, May 22, 2017](https://letsencrypt.org/documents/isrg-cp-v2.0/) | |
| 63 | - [CP v1.3, April 13, 2017](https://letsencrypt.org/documents/ISRG-CP-v1.3.pdf) | |
| 64 | - [CPS v2.0, April 13, 2017](https://letsencrypt.org/documents/isrg-cps-v2.0/) | |
| 65 | - [CPS v1.5, October 18, 2016](https://letsencrypt.org/documents/ISRG-CPS-October-18-2016.pdf) | |
| 66 | - [CP v1.2, May 5, 2016](https://letsencrypt.org/documents/ISRG-CP-May-5-2016.pdf) | |
| 67 | - [CPS v1.4, May 5, 2016](https://letsencrypt.org/documents/ISRG-CPS-May-5-2016.pdf) | |
| 68 | - [CPS v1.3, March 16, 2016](https://letsencrypt.org/documents/ISRG-CPS-March-16-2016.pdf) | |
| 69 | - [CPS v1.2, September 22, 2015](https://letsencrypt.org/documents/ISRG-CPS-September-22-2015.pdf) | |
| 70 | - [CP v1.1, September 9, 2015](https://letsencrypt.org/documents/ISRG-CP-September-9-2015.pdf) | |
| 71 | - [CPS v1.1, September 9, 2015](https://letsencrypt.org/documents/ISRG-CPS-September-9-2015.pdf) | |
| 72 | - [CP v1.0, May 5, 2015](https://letsencrypt.org/documents/ISRG-CP-May-5-2015.pdf) | |
| 73 | - [CPS v1.0, May 5, 2015](https://letsencrypt.org/documents/ISRG-CPS-May-5-2015.pdf) | |
| 74 | ||
| 75 | ## Let's Encrypt Privacy Policy | |
| 76 | ||
| 77 | - [Current Privacy Policy](https://letsencrypt.org/privacy/) | |
| 78 | ||
| 79 | ## Let's Encrypt Trademark Policy | |
| 80 | ||
| 81 | - [Current Trademark Policy](https://www.abetterinternet.org/trademarks/) | |
| 82 | ||
| 83 | ## ISRG Code of Conduct | |
| 84 | ||
| 85 | - [Current ISRG Code of Conduct](https://www.abetterinternet.org/code-of-conduct/) | |
| 86 | ||
| 87 | ## ISRG Non-Discrimination Statement and Policy | |
| 88 | ||
| 89 | - [Current ISRG Non-Discrimination Statement and Policy](https://www.abetterinternet.org/nondiscrimination/) | |
| 90 | ||
| 91 | ## ISRG Legal Transparency Reports | |
| 92 | ||
| 93 | - [October 4, 2024](https://letsencrypt.org/documents/ISRG-Legal-Transparency-Report-October-4-2024.pdf) | |
| 94 | ||
| 95 | - [April 3, 2024](https://letsencrypt.org/documents/ISRG-Legal-Transparency-Report-April-3-2024.pdf) | |
| 96 | - [October 1, 2023](https://letsencrypt.org/documents/ISRG-Legal-Transparency-Report-October-1-2023.pdf) | |
| 97 | - [April 1, 2023](https://letsencrypt.org/documents/ISRG-Legal-Transparency-Report-April-1-2023.pdf) | |
| 98 | - [October 1, 2022](https://letsencrypt.org/documents/ISRG-Legal-Transparency-Report-October-1-2022.pdf) | |
| 99 | - [April 1, 2022](https://letsencrypt.org/documents/ISRG-Legal-Transparency-Report-April-1-2022.pdf) | |
| 100 | - [October 1, 2021](https://letsencrypt.org/documents/ISRG-Legal-Transparency-Report-October-1-2021.pdf) | |
| 101 | - [April 1, 2021](https://letsencrypt.org/documents/ISRG-Legal-Transparency-Report-April-1-2021.pdf) | |
| 102 | - [October 1, 2020](https://letsencrypt.org/documents/ISRG-Legal-Transparency-Report-October-1-2020.pdf) | |
| 103 | - [April 1, 2020](https://letsencrypt.org/documents/ISRG-Legal-Transparency-Report-April-1-2020.pdf) | |
| 104 | - [October 1, 2019](https://letsencrypt.org/documents/ISRG-Legal-Transparency-Report-October-1-2019.pdf) | |
| 105 | - [April 1, 2019](https://letsencrypt.org/documents/ISRG-Legal-Transparency-Report-April-1-2019.pdf) | |
| 106 | - [October 1, 2018](https://letsencrypt.org/documents/ISRG-Legal-Transparency-Report-October-1-2018.pdf) | |
| 107 | - [April 1, 2018](https://letsencrypt.org/documents/ISRG-Legal-Transparency-Report-April-1-2018.pdf) | |
| 108 | - [October 1, 2017](https://letsencrypt.org/documents/ISRG-Legal-Transparency-Report-October-1-2017.pdf) | |
| 109 | - [April 1, 2017](https://letsencrypt.org/documents/ISRG-Legal-Transparency-Report-April-1-2017.pdf) | |
| 110 | - [October 1, 2016](https://letsencrypt.org/documents/ISRG-Legal-Transparency-Report-October-1-2016.pdf) | |
| 111 | - [April 1, 2016](https://letsencrypt.org/documents/ISRG-Legal-Transparency-Report-April-1-2016.pdf) | |
| 112 | - [July 1, 2015](https://letsencrypt.org/documents/ISRG-Legal-Transparency-Report-July-1-2015.pdf) | |
| 113 | ||
| 114 | ## WebTrust Audits | |
| 115 | ||
| 116 | - November 20, 2024: [Trust Services Principles and Criteria for Certification Authorities Version 2.2.2](https://www.cpacanada.ca/webtrustseal) | |
| 117 | - November 20, 2024: [WebTrust Principles and Criteria for Certification Authorities - SSL Baseline with Network Security - Version 2.7](https://www.cpacanada.ca/webtrustseal) | |
| 118 | ||
| 119 | - November 8, 2023: [Trust Services Principles and Criteria for Certification Authorities Version 2.2.2](https://letsencrypt.org/audits/ISRG-2023-WebTrust-for-CAs-Report.pdf) | |
| 120 | - November 8, 2023: [WebTrust Principles and Criteria for Certification Authorities - SSL Baseline with Network Security - Version 2.6](https://letsencrypt.org/audits/ISRG-2023-WebTrust-for-CAs-SSL-Baseline-Report.pdf) | |
| 121 | - November 8, 2022: [Trust Services Principles and Criteria for Certification Authorities Version 2.2.2](https://letsencrypt.org/audits/ISRG-2022-WebTrust-for-CAs-Report.pdf) | |
| 122 | - November 8, 2022: [WebTrust Principles and Criteria for Certification Authorities - SSL Baseline with Network Security - Version 2.5](https://letsencrypt.org/audits/ISRG-2022-WebTrust-for-CAs-SSL-Baseline-Report.pdf) | |
| 123 | - October 14, 2021: [Trust Services Principles and Criteria for Certification Authorities Version 2.2.1](https://letsencrypt.org/audits/ISRG-2021-WebTrust-for-CAs-Report.pdf) | |
| 124 | - October 14, 2021: [WebTrust Principles and Criteria for Certification Authorities - SSL Baseline with Network Security - Version 2.4.1](https://letsencrypt.org/audits/ISRG-2021-WebTrust-for-CAs-SSL-Baseline-Report.pdf) | |
| 125 | - October 2, 2020: [Trust Services Principles and Criteria for Certification Authorities Version 2.2](https://letsencrypt.org/audits/ISRG-2020-WebTrust-for-CAs-Report.pdf) | |
| 126 | - October 2, 2020: [WebTrust Principles and Criteria for Certification Authorities - SSL Baseline with Network Security - Version 2.4.1](https://letsencrypt.org/audits/ISRG-2020-WebTrust-for-CAs-SSL-Baseline-Report.pdf) | |
| 127 | - November 14, 2019: [Trust Services Principles and Criteria for Certification Authorities Version 2.1](https://letsencrypt.org/audits/ISRG-2019-WebTrust-for-CAs-Report.pdf) | |
| 128 | - November 11, 2019: [WebTrust Principles and Criteria for Certification Authorities - SSL Baseline with Network Security - Version 2.3](https://letsencrypt.org/audits/ISRG-2019-WebTrust-for-CAs-SSL-Baseline-Report.pdf) | |
| 129 | - November 30, 2018: [Trust Services Principles and Criteria for Certification Authorities Version 2.1](https://letsencrypt.org/audits/ISRG-2018-WebTrust-for-CAs-Report.pdf) | |
| 130 | - November 30, 2018: [WebTrust Principles and Criteria for Certification Authorities - SSL Baseline with Network Security - Version 2.3](https://letsencrypt.org/audits/ISRG-2018-WebTrust-for-CAs-SSL-Baseline-Report.pdf) | |
| 131 | - December 15, 2017: [Trust Services Principles and Criteria for Certification Authorities Version 2.0](https://letsencrypt.org/audits/ISRG-2017-WebTrust-for-CAs-Report.pdf) | |
| 132 | - December 15, 2017: [WebTrust Principles and Criteria for Certification Authorities - SSL Baseline with Network Security - Version 2.2](https://letsencrypt.org/audits/ISRG-2017-WebTrust-for-CAs-SSL-Baseline-Report.pdf) | |
| 133 | - December 15, 2016: [Trust Services Principles and Criteria for Certification Authorities Version 2.0](https://letsencrypt.org/audits/ISRG-2016-WebTrust-for-CAs-Report.pdf) | |
| 134 | - December 15, 2016: [WebTrust Principles and Criteria for Certification Authorities - SSL Baseline with Network Security - Version 2.0](https://letsencrypt.org/audits/ISRG-2016-WebTrust-for-CAs-SSL-Baseline-Report.pdf) | |
| 135 | - December 15, 2015: [Trust Services Principles and Criteria for Certification Authorities Version 2.0](https://letsencrypt.org/audits/ISRG-2015-WebTrust-for-CAs-Report.pdf) | |
| 136 | - December 15, 2015: [WebTrust Principles and Criteria for Certification Authorities - SSL Baseline with Network Security - Version 2.0](https://letsencrypt.org/audits/ISRG-2015-WebTrust-for-CAs-SSL-Baseline-Report.pdf) | |
| 137 | - September 9, 2015: [Trust Service Principles and Criteria for Certification Authorities Version 2.0](https://letsencrypt.org/audits/ISRG-2015-WebTrust-for-CAs-PITRA-Report.pdf) | |
| 138 | - September 9, 2015: [WebTrust Principles and Criteria for Certification Authorities - SSL Baseline with Network Security - Version 2.0](https://letsencrypt.org/audits/ISRG-2015-WebTrust-for-CAs-SSL-Baseline-PITRA-Report.pdf) | |
| 139 | ||
| 140 | ## Certificate Problem Reports | |
| 141 | ||
| 142 | To report private key compromise, certificate misuse, or other types of fraud, compromise, misuse, inappropriate conduct, or any other matter related to certificates, please email [cert-prob-reports@letsencrypt.org](mailto:cert-prob-reports@letsencrypt.org). | |
| 15 | ###### Subscribe for email updates about Let's Encrypt and other ISRG projects |