diff --git a/lib/permissions/minimally-encoded-raw-thread-info-validators.js b/lib/permissions/minimally-encoded-raw-thread-info-validators.js
--- a/lib/permissions/minimally-encoded-raw-thread-info-validators.js
+++ b/lib/permissions/minimally-encoded-raw-thread-info-validators.js
@@ -15,6 +15,7 @@
   RoleInfoWithoutSpecialRole,
   RawThreadInfoWithoutSpecialRole,
   MinimallyEncodedThickMemberInfo,
+  MemberInfoSansPermissions,
 } from '../types/minimally-encoded-thread-permissions-types.js';
 import { threadSubscriptionValidator } from '../types/subscription-types.js';
 import {
@@ -71,6 +72,14 @@
     permissions: tHexEncodedPermissionsBitmask,
   });
 
+const memberInfoSansPermissionsValidator: TInterface<MemberInfoSansPermissions> =
+  tShape<MemberInfoSansPermissions>({
+    id: tUserID,
+    role: t.maybe(tID),
+    isSender: t.Boolean,
+    minimallyEncoded: tBool(true),
+  });
+
 const minimallyEncodedThickMemberInfoValidator: TInterface<MinimallyEncodedThickMemberInfo> =
   tShape<MinimallyEncodedThickMemberInfo>({
     minimallyEncoded: tBool(true),
@@ -113,6 +122,7 @@
 
 export {
   memberInfoWithPermissionsValidator,
+  memberInfoSansPermissionsValidator,
   minimallyEncodedThickMemberInfoValidator,
   roleInfoValidator,
   persistedRoleInfoValidator,
diff --git a/lib/permissions/minimally-encoded-raw-thread-info-validators.test.js b/lib/permissions/minimally-encoded-raw-thread-info-validators.test.js
new file mode 100644
--- /dev/null
+++ b/lib/permissions/minimally-encoded-raw-thread-info-validators.test.js
@@ -0,0 +1,30 @@
+// @flow
+
+import { memberInfoSansPermissionsValidator } from './minimally-encoded-raw-thread-info-validators.js';
+
+describe('memberInfoSansPermissionsValidator should validate correctly formed MemberInfoSansPermissions', () => {
+  test('should validate correctly formed MemberInfoSansPermissions', () => {
+    const memberInfoSansPermissions = {
+      id: '1',
+      role: '2',
+      isSender: true,
+      minimallyEncoded: true,
+    };
+
+    expect(
+      memberInfoSansPermissionsValidator.is(memberInfoSansPermissions),
+    ).toBe(true);
+  });
+
+  test('should NOT validate MemberInfoSansPermissions without id', () => {
+    const memberInfoSansPermissions = {
+      role: '2',
+      isSender: true,
+      minimallyEncoded: true,
+    };
+
+    expect(
+      memberInfoSansPermissionsValidator.is(memberInfoSansPermissions),
+    ).toBe(false);
+  });
+});