diff --git a/api-v3/src/database/migrations/1790000200000-f4-company-signature-invites.ts b/api-v3/src/database/migrations/1790000200000-f4-company-signature-invites.ts
new file mode 100644
index 0000000..99c2c4e
--- /dev/null
+++ b/api-v3/src/database/migrations/1790000200000-f4-company-signature-invites.ts
@@ -0,0 +1,51 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+export class F4CompanySignatureInvites1790000200000 implements MigrationInterface {
+  name = 'F4CompanySignatureInvites1790000200000';
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`
+      CREATE TABLE inspection_act_company_signature_invites (
+        id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+        act_id uuid NOT NULL,
+        token_sha256 char(64) NOT NULL UNIQUE,
+        recipient_email varchar(320) NOT NULL,
+        recipient_name varchar(200),
+        recipient_document_type varchar(20),
+        recipient_document_number varchar(40),
+        recipient_position varchar(200),
+        status varchar(20) NOT NULL DEFAULT 'PENDING',
+        expires_at timestamptz NOT NULL,
+        sent_at timestamptz,
+        used_at timestamptz,
+        revoked_at timestamptz,
+        created_by uuid NOT NULL,
+        revoked_by uuid,
+        created_at timestamptz NOT NULL DEFAULT CURRENT_TIMESTAMP,
+        updated_at timestamptz NOT NULL DEFAULT CURRENT_TIMESTAMP,
+        CONSTRAINT fk_company_signature_invite_act FOREIGN KEY (act_id)
+          REFERENCES inspection_acts(id) ON DELETE CASCADE,
+        CONSTRAINT fk_company_signature_invite_created_by FOREIGN KEY (created_by)
+          REFERENCES users(id) ON DELETE RESTRICT,
+        CONSTRAINT fk_company_signature_invite_revoked_by FOREIGN KEY (revoked_by)
+          REFERENCES users(id) ON DELETE SET NULL,
+        CONSTRAINT chk_company_signature_invite_status CHECK (
+          status IN ('PENDING','USED','REVOKED','EXPIRED')
+        )
+      )
+    `);
+    await queryRunner.query(`
+      CREATE INDEX idx_company_signature_invites_act_created
+      ON inspection_act_company_signature_invites(act_id,created_at DESC)
+    `);
+    await queryRunner.query(`
+      CREATE INDEX idx_company_signature_invites_pending_expiry
+      ON inspection_act_company_signature_invites(status,expires_at)
+      WHERE status='PENDING'
+    `);
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query('DROP TABLE IF EXISTS inspection_act_company_signature_invites');
+  }
+}