diff --git a/loopback/server/middleware/specs/value-is-not.spec.js b/loopback/server/middleware/specs/value-is-not.spec.js
deleted file mode 100644
index 4d65ddf56..000000000
--- a/loopback/server/middleware/specs/value-is-not.spec.js
+++ /dev/null
@@ -1,59 +0,0 @@
-const valueIsNot = require('../value-is-not');
-
-fdescribe('Value is not', () => {
-    const i18n = require('i18n');
-
-    const userId = 9;
-    const ctx = {
-        req: {
-
-            accessToken: {userId: userId},
-            headers: {origin: 'http://localhost:5000'},
-        }
-    };
-
-    fit('UpdateFiscalData endpoint', () => {
-        let messageError = 'Value is not number';
-        const tag = 'provinceFk';
-        try {
-            expect(valueIsNot.validation(messageError)).toBeTrue();
-            const data = {
-                method: 'PATCH',
-                originalUrl: '/api/supplier/updateFiscalData',
-                body: {
-                    [tag]: null
-                },
-                __: i18n
-            };
-            const result = valueIsNot.handleError(data);
-
-            expect(result.tag).toEqual(tag);
-            expect(valueIsNot.message(result, i18n)).toEqual('El campo \'provincia\' no es válido');
-        } catch (error) {
-            expect(error).toBeDefined();
-        }
-    });
-
-    describe('OsTicket', () => {
-        let messageError = 'Value is not object';
-        const tag = 'additionalData';
-        it('sendToSupport endpoint', () => {
-            try {
-                expect(valueIsNot.validation(messageError)).toBeTrue();
-                const data = {
-                    method: 'POST',
-                    originalUrl: '/api/OsTickets/send-to-support?access_token=DEFAULT_TOKEN',
-                    body: {
-                        [tag]: '{ \'foo\': 42 }'
-                    }
-                };
-                const result = valueIsNot.handleError(data);
-
-                expect(result.tag).toEqual(tag);
-                expect(valueIsNot.message(tag, i18n)).toEqual(`El campo '${tag}' no es válido`);
-            } catch (error) {
-                expect(error).toBeDefined();
-            }
-        });
-    });
-});
diff --git a/loopback/server/middleware/value-invalid.js b/loopback/server/middleware/value-invalid.js
deleted file mode 100644
index 962aa9e1f..000000000
--- a/loopback/server/middleware/value-invalid.js
+++ /dev/null
@@ -1,58 +0,0 @@
-const SLASH = '/';
-const $t = require('i18n');
-const {models} = require('vn-loopback/server/server');
-const mapLocale = require('../../util/map-locales');
-
-
-module.exports = {
-    validation: message => String(message).includes('is not valid'),
-    message: ({tagValue}, {__: $t}) =>
-        $t('Field are invalid', {tag: tagValue}),
-    handleError: ({method: verb, originalUrl, body}, err) => {
-        let tag = null;
-        let module = null;
-        let moduleOriginal = null;
-        let path = null;
-        try {
-            if (originalUrl.includes('?'))
-                originalUrl = originalUrl.split('?')[0];
-
-            originalUrl = originalUrl.split('api/')[1];
-            [module, ...path] = originalUrl.split(SLASH);
-
-            moduleOriginal = module;
-            let model = models[module];
-            // Capitalize
-            if (!model) {
-                module = module.charAt(0).toUpperCase() + module.slice(1);
-                model = models[module];
-            }
-            // Singular
-            if (!model) {
-                module = module.substring(0, module.length - 1);
-                model = models[module];
-            }
-            if (!model) throw new Error('No matching model found');
-            tag = Object.keys(err.details.codes)[0];
-            if (tag) {
-                let tagValue = mapLocale[$t.getLocale()][tag];
-                if (!tagValue) tagValue = tag;
-                return {tag, tagValue};
-            }
-        } catch (error) {
-            throw new Error(error);
-        }
-    }
-
-};
-
-
-
-function isJsonString(str) {
-    try {
-        let json = JSON.parse(str);
-        return (typeof json === 'object');
-    } catch (e) {
-        return false;
-    }
-}
diff --git a/loopback/server/middleware/value-is-not.js b/loopback/server/middleware/value-is-not.js
deleted file mode 100644
index 021af3fb9..000000000
--- a/loopback/server/middleware/value-is-not.js
+++ /dev/null
@@ -1,106 +0,0 @@
-const SLASH = '/';
-const {models} = require('vn-loopback/server/server');
-const $t = require('i18n');
-const mapLocale = require('../../util/map-locales');
-
-module.exports = {
-    validation: message => String(message).startsWith('Value is not'),
-    message: ({tagValue}, {__: $t}) =>
-        $t('Field are invalid', {tag: tagValue}),
-    handleError: ({method: verb, originalUrl, body}) => {
-        let tag = null;
-        let module = null;
-        let path = null;
-        let hasId = false;
-        try {
-            if (originalUrl.includes('?'))
-                originalUrl = originalUrl.split('?')[0];
-
-            originalUrl = originalUrl.split('api/')[1];
-            [module, ...path] = originalUrl.split(SLASH);
-            hasId = path.length > 1;
-
-            let model = models[module];
-            // Capitalize
-            if (!model) {
-                module = module.charAt(0).toUpperCase() + module.slice(1);
-                model = models[module];
-            }
-            // Singular
-            if (!model) {
-                module = module.substring(0, module.length - 1);
-                model = models[module];
-            }
-            if (!model) throw new Error('No matching model found');
-            const currentMethod = model.sharedClass.methods().find(method => {
-                const methodMatch = [method.http].flat().filter(el => el.verb === verb.toLowerCase()).find(el => {
-                    let isValid = false;
-                    if (hasId)
-                        isValid = el.path.replace(':id', path[0]) === SLASH + path.join(SLASH);
-                    else
-                        isValid = el.path.endsWith(path[0]);
-                    return isValid;
-                });
-                if (methodMatch)
-                    return method;
-            }
-            );
-            if (!currentMethod) throw new Error('No matching currentMethod found');
-            const {accepts} = currentMethod;
-            for (const [key, value] of Object.entries(body)) {
-                if (!value) {
-                    tag = key;
-                    break;
-                }
-                const accept = accepts.find(acc => acc.arg === key);
-                if (accept.type !== 'any') {
-                    let isValid = false;
-                    if (value) {
-                        switch (accept.type) {
-                        case 'object':
-                            isValid = isJsonString(value);
-                            break;
-                        case 'number':
-                            isValid = /^[0-9]*$/.test(value);
-                            break;
-
-                        case 'boolean':
-                            isValid = value instanceof Boolean;
-                            break;
-
-                        case 'date':
-                            isValid = (new Date(date) !== 'Invalid Date') && !isNaN(new Date(date));
-                            break;
-
-                        case 'string':
-                            isValid = typeof value == 'string';
-                            break;
-                        }
-                    }
-                    if (!isValid) {
-                        tag = key;
-                        break;
-                    }
-                }
-            }
-            if (tag) {
-                let tagValue = mapLocale[$t.getLocale()][tag];
-                if (!tagValue) tagValue = tag;
-                return {tag, tagValue};
-            }
-        } catch (error) {
-            throw new Error(error);
-        }
-    }
-
-};
-
-
-function isJsonString(str) {
-    try {
-        let json = JSON.parse(str);
-        return (typeof json === 'object');
-    } catch (e) {
-        return false;
-    }
-}
diff --git a/loopback/util/map-locales.js b/loopback/util/map-locales.js
deleted file mode 100644
index 692de3f23..000000000
--- a/loopback/util/map-locales.js
+++ /dev/null
@@ -1,23 +0,0 @@
-const SLASH = '/';
-const MODULES = 'modules';
-const BACK = 'back';
-const path = require('path');
-const glob = require('glob');
-const modulesPath = `${MODULES}/**/${BACK}/locale/**/**.yml`;
-const pathResolve = path.resolve(modulesPath);
-
-const modelsLocale = glob.sync(pathResolve, {}).reduce((acc, f) => {
-    const file = require(f);
-    const model = f.substring(f.indexOf(MODULES), f.indexOf(BACK) - 1).split(SLASH)[1];
-    const locale = path.parse(f).base.split('.')[0];
-
-    if (!acc[locale]) acc[locale] = {};
-    acc[locale] = Object.assign(acc[locale], file.columns);
-    return acc;
-}, {}
-);
-function keyMap(model, local, connector = '_') {
-    return `${model}${connector}${local}`;
-}
-module.exports =modelsLocale;
-
diff --git a/loopback/util/map-methods.js b/loopback/util/map-methods.js
deleted file mode 100644
index 2858cd61d..000000000
--- a/loopback/util/map-methods.js
+++ /dev/null
@@ -1,12 +0,0 @@
-const SLASH = '/';
-const MODULES = 'modules';
-const BACK = 'back';
-
-const app = require('vn-loopback/server/server');
-
-const modelsMethods = app;
-function keyMap(model, local, connector = '_') {
-    return `${model}${connector}${local}`;
-}
-module.exports = modelsMethods;
-