To help customers fulfill financial reporting related requirements, Salesforce provides a SOC 1 Bridge letter - sometimes referred to as a Gap Letter or Comfort Letter - to provide assurance coverage over the difference in customer financial reporting periods and the currently available report period. It is only available for the SOC 1 Type II (SSAE 18) Report. Letters are signed and released at the end of June, September, March, December of each year. No other time periods are possible. This is the only letter that can be made available. Customer specific letters are not possible.