diff --git a/Cicm.Database/Models/Person.cs b/Cicm.Database/Models/Person.cs
index 66222632..b68f53e3 100644
--- a/Cicm.Database/Models/Person.cs
+++ b/Cicm.Database/Models/Person.cs
@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.ComponentModel;
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
+using Microsoft.AspNetCore.Mvc;
 
 namespace Cicm.Database.Models
 {
@@ -21,8 +22,9 @@ namespace Cicm.Database.Models
         [DataType(DataType.Date)]
         public DateTime? DeathDate { get; set; }
         [Url]
-        public string Webpage { get;          set; }
-        public string Twitter          { get; set; }
+        public string Webpage { get; set; }
+        [Remote("VerifyTwitter", "People", "Admin")]
+        public string Twitter { get;          set; }
         public string Facebook         { get; set; }
         public Guid   Photo            { get; set; }
         public int?   DocumentPersonId { get; set; }
diff --git a/cicm_web/Areas/Admin/Controllers/PeopleController.cs b/cicm_web/Areas/Admin/Controllers/PeopleController.cs
index 2b507730..84f5078d 100644
--- a/cicm_web/Areas/Admin/Controllers/PeopleController.cs
+++ b/cicm_web/Areas/Admin/Controllers/PeopleController.cs
@@ -5,6 +5,7 @@ using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.AspNetCore.Mvc.Rendering;
 using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Query;
 
 namespace cicm_web.Areas.Admin.Controllers
 {
@@ -12,7 +13,7 @@ namespace cicm_web.Areas.Admin.Controllers
     [Authorize]
     public class PeopleController : Controller
     {
-        private readonly cicmContext _context;
+        readonly cicmContext _context;
 
         public PeopleController(cicmContext context)
         {
@@ -22,25 +23,17 @@ namespace cicm_web.Areas.Admin.Controllers
         // GET: People
         public async Task<IActionResult> Index()
         {
-            var cicmContext = _context.People.Include(p => p.CountryOfBirth);
+            IIncludableQueryable<Person, Iso31661Numeric> cicmContext = _context.People.Include(p => p.CountryOfBirth);
             return View(await cicmContext.ToListAsync());
         }
 
         // GET: People/Details/5
         public async Task<IActionResult> Details(int? id)
         {
-            if (id == null)
-            {
-                return NotFound();
-            }
+            if(id == null) return NotFound();
 
-            var person = await _context.People
-                .Include(p => p.CountryOfBirth)
-                .FirstOrDefaultAsync(m => m.Id == id);
-            if (person == null)
-            {
-                return NotFound();
-            }
+            Person person = await _context.People.Include(p => p.CountryOfBirth).FirstOrDefaultAsync(m => m.Id == id);
+            if(person == null) return NotFound();
 
             return View(person);
         }
@@ -57,32 +50,32 @@ namespace cicm_web.Areas.Admin.Controllers
         // more details see http://go.microsoft.com/fwlink/?LinkId=317598.
         [HttpPost]
         [ValidateAntiForgeryToken]
-        public async Task<IActionResult> Create([Bind("Name,Surname,BirthDate,DeathDate,Webpage,Twitter,Facebook,Photo,CountryOfBirthId,Id")] Person person)
+        public async Task<IActionResult> Create(
+            [Bind("Name,Surname,BirthDate,DeathDate,Webpage,Twitter,Facebook,Photo,CountryOfBirthId,Id")]
+            Person person)
         {
-            if (ModelState.IsValid)
+            if(ModelState.IsValid)
             {
                 _context.Add(person);
                 await _context.SaveChangesAsync();
                 return RedirectToAction(nameof(Index));
             }
-            ViewData["CountryOfBirthId"] = new SelectList(_context.Iso31661Numeric, "Id", "Name", person.CountryOfBirthId);
+
+            ViewData["CountryOfBirthId"] =
+                new SelectList(_context.Iso31661Numeric, "Id", "Name", person.CountryOfBirthId);
             return View(person);
         }
 
         // GET: People/Edit/5
         public async Task<IActionResult> Edit(int? id)
         {
-            if (id == null)
-            {
-                return NotFound();
-            }
+            if(id == null) return NotFound();
 
-            var person = await _context.People.FindAsync(id);
-            if (person == null)
-            {
-                return NotFound();
-            }
-            ViewData["CountryOfBirthId"] = new SelectList(_context.Iso31661Numeric, "Id", "Name", person.CountryOfBirthId);
+            Person person = await _context.People.FindAsync(id);
+            if(person == null) return NotFound();
+
+            ViewData["CountryOfBirthId"] =
+                new SelectList(_context.Iso31661Numeric, "Id", "Name", person.CountryOfBirthId);
             return View(person);
         }
 
@@ -91,70 +84,64 @@ namespace cicm_web.Areas.Admin.Controllers
         // more details see http://go.microsoft.com/fwlink/?LinkId=317598.
         [HttpPost]
         [ValidateAntiForgeryToken]
-        public async Task<IActionResult> Edit(int id, [Bind("Name,Surname,BirthDate,DeathDate,Webpage,Twitter,Facebook,Photo,CountryOfBirthId,Id")] Person person)
+        public async Task<IActionResult> Edit(
+            int id, [Bind("Name,Surname,BirthDate,DeathDate,Webpage,Twitter,Facebook,Photo,CountryOfBirthId,Id")]
+            Person person)
         {
-            if (id != person.Id)
-            {
-                return NotFound();
-            }
+            if(id != person.Id) return NotFound();
 
-            if (ModelState.IsValid)
+            if(ModelState.IsValid)
             {
                 try
                 {
                     _context.Update(person);
                     await _context.SaveChangesAsync();
                 }
-                catch (DbUpdateConcurrencyException)
+                catch(DbUpdateConcurrencyException)
                 {
-                    if (!PersonExists(person.Id))
-                    {
-                        return NotFound();
-                    }
-                    else
-                    {
-                        throw;
-                    }
+                    if(!PersonExists(person.Id)) return NotFound();
+
+                    throw;
                 }
+
                 return RedirectToAction(nameof(Index));
             }
-            ViewData["CountryOfBirthId"] = new SelectList(_context.Iso31661Numeric, "Id", "Name", person.CountryOfBirthId);
+
+            ViewData["CountryOfBirthId"] =
+                new SelectList(_context.Iso31661Numeric, "Id", "Name", person.CountryOfBirthId);
             return View(person);
         }
 
         // GET: People/Delete/5
         public async Task<IActionResult> Delete(int? id)
         {
-            if (id == null)
-            {
-                return NotFound();
-            }
+            if(id == null) return NotFound();
 
-            var person = await _context.People
-                .Include(p => p.CountryOfBirth)
-                .FirstOrDefaultAsync(m => m.Id == id);
-            if (person == null)
-            {
-                return NotFound();
-            }
+            Person person = await _context.People.Include(p => p.CountryOfBirth).FirstOrDefaultAsync(m => m.Id == id);
+            if(person == null) return NotFound();
 
             return View(person);
         }
 
         // POST: People/Delete/5
-        [HttpPost, ActionName("Delete")]
+        [HttpPost]
+        [ActionName("Delete")]
         [ValidateAntiForgeryToken]
         public async Task<IActionResult> DeleteConfirmed(int id)
         {
-            var person = await _context.People.FindAsync(id);
+            Person person = await _context.People.FindAsync(id);
             _context.People.Remove(person);
             await _context.SaveChangesAsync();
             return RedirectToAction(nameof(Index));
         }
 
-        private bool PersonExists(int id)
+        bool PersonExists(int id)
         {
             return _context.People.Any(e => e.Id == id);
         }
+
+        [AcceptVerbs("Get", "Post")]
+        public IActionResult VerifyTwitter(string twitter) =>
+            twitter?.Length > 0 && twitter[0] == '@' ? Json(true) : Json("Invalid twitter handle.");
     }
-}
+}
\ No newline at end of file
diff --git a/cicm_web/cicm_web.csproj b/cicm_web/cicm_web.csproj
index 06315c59..ec2129c4 100644
--- a/cicm_web/cicm_web.csproj
+++ b/cicm_web/cicm_web.csproj
@@ -2,7 +2,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
   <PropertyGroup>
     <TargetFramework>netcoreapp2.2</TargetFramework>
-    <Version>3.0.99.864</Version>
+    <Version>3.0.99.865</Version>
     <Company>Canary Islands Computer Museum</Company>
     <Copyright>Copyright © 2003-2018 Natalia Portillo</Copyright>
     <Product>Canary Islands Computer Museum Website</Product>