diff --git a/Moonlight/App/Database/Entities/User.cs b/Moonlight/App/Database/Entities/User.cs
index 76d23e4..40f0eae 100644
--- a/Moonlight/App/Database/Entities/User.cs
+++ b/Moonlight/App/Database/Entities/User.cs
@@ -1,4 +1,5 @@
-using Moonlight.App.Models.Misc;
+using System.ComponentModel.DataAnnotations;
+using Moonlight.App.Models.Misc;
 
 namespace Moonlight.App.Database.Entities;
 
@@ -8,13 +9,35 @@ public class User
     
     // Personal data
     
+    [Required]
+    [MinLength(3, ErrorMessage = "Invalid first name")]
     public string FirstName { get; set; } = "";
+    
+    [Required]
+    [MinLength(3, ErrorMessage = "Invalid last name")]
     public string LastName { get; set; } = "";
+    
+    [Required]
+    [RegularExpression(@"^((((([a-zA-Z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-zA-Z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-zA-Z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-zA-Z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-zA-Z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-zA-Z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-zA-Z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-zA-Z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-zA-Z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-zA-Z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?)[;]?)+$",
+        ErrorMessage = "Must be a valid email")]
     public string Email { get; set; } = "";
+    
     public string Password { get; set; } = "";
+    
+    [Required]
+    [RegularExpression(@"^(?:[A-Z] \d|[^\W\d_]{2,}\.?)(?:[- '’][^\W\d_]+\.?)*\s+[1-9]\d{0,3} ?[a-zA-Z]?(?: ?[/-] ?[1-9]\d{0,3} ?[a-zA-Z]?)?$", ErrorMessage = "Street and house number required")]
     public string Address { get; set; } = "";
+    
+    [Required]
+    [MinLength(3, ErrorMessage = "Invalid city")]
     public string City { get; set; } = "";
+    
+    [Required]
+    [MinLength(3, ErrorMessage = "Invalid state")]
     public string State { get; set; } = "";
+    
+    [Required]
+    [MinLength(3, ErrorMessage = "Invalid country")]
     public string Country { get; set; } = "";
     
     // States