diff --git a/src/api/platforms/platforms.js b/src/api/platforms/platforms.js
index a89f202..f350144 100644
--- a/src/api/platforms/platforms.js
+++ b/src/api/platforms/platforms.js
@@ -1,6 +1,6 @@
 import fetch from 'node-fetch';
 import { determineError } from '../../services/errors';
-import {get, patch, post, put} from '../../services/http';
+import { get, patch, post, put } from '../../services/http';
 import { PLATFORMS_FILES_LIVE_URL, PLATFORMS_FILES_SANDBOX_URL } from '../../config';
 
 const FormData = require('form-data');
@@ -76,6 +76,112 @@ export default class Platforms {
         }
     }
 
+    /**
+     * Our Platforms solution provides an easy way to upload documentation required for full due diligence.
+     * Use this endpoint to generate a file upload link, which you can then upload a file to using a data-binary type request.
+     * See the https://www.checkout.com/docs/platforms/onboard-sub-entities/full-sub-entity-onboarding/upload-a-file#Upload_a_file for more information.
+     *
+     * @memberof Platforms
+     * @param {string} entityId The ID of the sub-entity.
+     * @param {Object} body The body
+     * @param {string} body.purpose The purpose of the file upload.
+     * @returns {Promise<Object>}
+     */
+    async uploadAFile(entityId, body) {
+        try {
+            const response = await post(
+                fetch,
+                `${this.config.host}/accounts/entities/${entityId}/files`,
+                this.config,
+                this.config.sk,
+                body
+            );
+            return await response.json;
+        } catch (err) {
+            const error = await determineError(err);
+            throw error;
+        }
+    }
+
+    /**
+     * Retrieve information about a previously uploaded file.
+     *
+     * @memberof Platforms
+     * @param {string} entityId The ID of the sub-entity.
+     * @param {string} fileId The ID of the file. The value is always prefixed with file_.
+     * @returns {Promise<Object>}
+     */
+    async retrieveAFile(entityId, fileId) {
+        try {
+            const response = await get(
+                fetch,
+                `${this.config.host}/accounts/entities/${entityId}/files/${fileId}`,
+                this.config,
+                this.config.sk
+            );
+            return await response.json;
+        } catch (err) {
+            const error = await determineError(err);
+            throw error;
+        }
+    }
+
+    /**
+     * Retrieve information on all users of a sub-entity that has been invited through Hosted Onboarding
+     * (https://www.checkout.com/docs/platforms/onboard-sub-entities/onboard-with-hosted-onboarding). Only
+     * one user can be invited to onboard the sub-entity through Hosted Onboarding.
+     *
+     * To enable the Hosted Onboarding feature, contact your Customer Success Manager.
+     *
+     * @memberof Platforms
+     * @param {string} entityId Sub-entity id.
+     * @return {Promise<Object>} A promise to the Platforms response.
+     */
+    async getSubEntityMembers(entityId) {
+        try {
+            const response = await get(
+                fetch,
+                `${this.config.host}/accounts/entities/${entityId}/members`,
+                this.config,
+                this.config.sk
+            );
+            return await response.json;
+        } catch (err) {
+            const error = await determineError(err);
+            throw error;
+        }
+    }
+
+    /**
+     * Resend an invitation to the user of a sub-entity. The user will receive another email to continue their
+     * Hosted Onboarding (https://www.checkout.com/docs/platforms/onboard-sub-entities/onboard-with-hosted-onboarding)
+     * application. An invitation can only be resent to the user originally registered to the
+     * sub-entity.
+     *
+     * To enable the Hosted Onboarding feature, contact your Customer Success Manager.
+     *
+     * @memberof Platforms
+     * @param {string} entityId The ID of the sub-entity.
+     * @param {string} userId The ID of the invited user.
+     * @param {Object} body The body (Reinvite sub-entity member)
+     * @return {Promise<Object>} A promise to the Platforms response.
+     */
+    async reinviteSubEntityMember(entityId, userId, body) {
+        try {
+            const response = await put(
+                fetch,
+                `${this.config.host}/accounts/entities/${entityId}/members/${userId}`,
+                this.config,
+                this.config.sk,
+                body
+            );
+            return await response.json;
+        } catch (err) {
+            const error = await determineError(err);
+            throw error;
+        }
+    }
+
     /**
      * Use this endpoint to retrieve a sub-entity and its full details.
      *
diff --git a/test/platforms/platforms.js b/test/platforms/platforms.js
index b15c998..74d3fbd 100644
--- a/test/platforms/platforms.js
+++ b/test/platforms/platforms.js
@@ -389,6 +389,141 @@ describe('Platforms', () => {
         }
     });
 
+    it('should upload a file', async () => {
+        nock('https://access.sandbox.checkout.com').post('/connect/token').reply(201, {
+            access_token: '1234',
+            expires_in: 3600,
+            token_type: 'Bearer',
+            scope: 'flow',
+        });
+        nock('https://api.sandbox.checkout.com')
+          .post('/accounts/entities/ent_aneh5mtyobxzazriwuevngrz6y/files')
+          .reply(200, {
+              "id": "file_6lbss42ezvoufcb2beo76rvwly",
+              "maximum_size_in_bytes": 4194304,
+              "document_types_for_purpose": [
+                  "image/jpeg",
+                  "image/png",
+                  "image/jpg"
+              ],
+              "_links": {
+                  "upload": {
+                      "href": null
+                  },
+                  "self": {
+                      "href": "https://files.checkout.com/files/file_6lbss42ezvoufcb2beo76rvwly"
+                  }
+              }
+          });
+
+        let cko = new Checkout(platforms_secret, {
+            client: platforms_ack,
+            scope: ['accounts'],
+            environment: 'sandbox',
+        });
+        let platform = await cko.platforms.uploadAFile('ent_aneh5mtyobxzazriwuevngrz6y', {
+            purpose: "bank_verification"
+        });
+        expect(platform.id).to.equal('file_6lbss42ezvoufcb2beo76rvwly');
+        expect(platform.maximum_size_in_bytes).to.equal(4194304);
+    });
+
+    it('should retrieve a file', async () => {
+        nock('https://access.sandbox.checkout.com').post('/connect/token').reply(201, {
+            access_token: '1234',
+            expires_in: 3600,
+            token_type: 'Bearer',
+            scope: 'flow',
+        });
+        nock('https://api.sandbox.checkout.com')
+          .get('/accounts/entities/ent_aneh5mtyobxzazriwuevngrz6y/files/file_6lbss42ezvoufcb2beo76rvwly')
+          .reply(200, {
+              "id": "file_6lbss42ezvoufcb2beo76rvwly",
+              "status": "invalid",
+              "status_reasons": [
+                  "InvalidMimeType"
+              ],
+              "size": 1024,
+              "mime_type": "application/pdf",
+              "uploaded_on": "2020-12-01T15:01:01Z",
+              "purpose": "identity_verification",
+              "_links": {
+                  "download": {
+                      "href": "https://s3.eu-west-1.amazonaws.com/mp-files-api-clean-prod/ent_ociwguf5a5fe3ndmpnvpnwsi3e/file_6lbss42ezvoufcb2beo76rvwly?X-Amz-Expires=3600&x-amz-security-token=some_token"
+                  },
+                  "self": {
+                      "href": "https://files.checkout.com/files/file_6lbss42ezvoufcb2beo76rvwly"
+                  }
+              }
+          });
+
+        let cko = new Checkout(platforms_secret, {
+            client: platforms_ack,
+            scope: ['accounts'],
+            environment: 'sandbox',
+        });
+
+        let file = await cko.platforms.retrieveAFile('ent_aneh5mtyobxzazriwuevngrz6y', 'file_6lbss42ezvoufcb2beo76rvwly');
+        expect(file.id).to.equal('file_6lbss42ezvoufcb2beo76rvwly');
+        expect(file.status).to.equal('invalid');
+        expect(file.size).to.equal(1024);
+        expect(file.mime_type).to.equal('application/pdf');
+        expect(file.purpose).to.equal('identity_verification');
+    });
+
+    it('should get a sub-entity members', async () => {
+        nock('https://access.sandbox.checkout.com').post('/connect/token').reply(201, {
+            access_token: '1234',
+            expires_in: 3600,
+            token_type: 'Bearer',
+            scope: 'flow',
+        });
+        nock('https://api.sandbox.checkout.com')
+          .get('/accounts/entities/ent_aneh5mtyobxzazriwuevngrz6y/members')
+          .reply(200, {
+              "data": [
+                  {
+                      "user_id": "usr_eyk754cqieqexfh6u46no5nnha"
+                  }
+              ]
+          });
+
+        let cko = new Checkout(platforms_secret, {
+            client: platforms_ack,
+            scope: ['accounts'],
+            environment: 'sandbox',
+        });
+
+        let response = await cko.platforms.getSubEntityMembers('ent_aneh5mtyobxzazriwuevngrz6y');
+        expect(response.data[0].user_id).to.equal('usr_eyk754cqieqexfh6u46no5nnha');
+    });
+
+    it('should reinvite a sub-entity member', async () => {
+        nock('https://access.sandbox.checkout.com').post('/connect/token').reply(201, {
+            access_token: '1234',
+            expires_in: 3600,
+            token_type: 'Bearer',
+            scope: 'flow',
+        });
+        nock('https://api.sandbox.checkout.com')
+          .put('/accounts/entities/ent_aneh5mtyobxzazriwuevngrz6y/members/usr_eyk754cqieqexfh6u46no5nnha')
+          .reply(200, {
+              "id": "usr_eyk754cqieqexfh6u46no5nnha"
+          });
+
+        let cko = new Checkout(platforms_secret, {
+            client: platforms_ack,
+            scope: ['accounts'],
+            environment: 'sandbox',
+        });
+
+        let member = await cko.platforms.reinviteSubEntityMember(
+          'ent_aneh5mtyobxzazriwuevngrz6y',
+          'usr_eyk754cqieqexfh6u46no5nnha');
+
+        expect(member.id).to.equal('usr_eyk754cqieqexfh6u46no5nnha');
+    });
+
     it('should get sub-entity details', async () => {
         nock('https://access.sandbox.checkout.com').post('/connect/token').reply(201, {
             access_token: '1234',