diff --git a/src/app/quickaction-dashboard/register-additional-information/personal/page.tsx b/src/app/quickaction-dashboard/register-additional-information/personal/page.tsx
index 7727bda..9940d66 100644
--- a/src/app/quickaction-dashboard/register-additional-information/personal/page.tsx
+++ b/src/app/quickaction-dashboard/register-additional-information/personal/page.tsx
@@ -20,6 +20,26 @@ interface PersonalProfileData {
   emergencyPhone: string
 }
 
+// Common nationalities list
+const NATIONALITIES = [
+  'German', 'Austrian', 'Swiss', 'Italian', 'French', 'Spanish', 'Portuguese', 'Dutch', 
+  'Belgian', 'Polish', 'Czech', 'Hungarian', 'Croatian', 'Slovenian', 'Slovak',
+  'British', 'Irish', 'Swedish', 'Norwegian', 'Danish', 'Finnish', 'Russian',
+  'Turkish', 'Greek', 'Romanian', 'Bulgarian', 'Serbian', 'Albanian', 'Bosnian',
+  'American', 'Canadian', 'Brazilian', 'Argentinian', 'Mexican', 'Chinese', 
+  'Japanese', 'Indian', 'Pakistani', 'Australian', 'South African', 'Other'
+]
+
+// Common countries list
+const COUNTRIES = [
+  'Germany', 'Austria', 'Switzerland', 'Italy', 'France', 'Spain', 'Portugal', 'Netherlands',
+  'Belgium', 'Poland', 'Czech Republic', 'Hungary', 'Croatia', 'Slovenia', 'Slovakia',
+  'United Kingdom', 'Ireland', 'Sweden', 'Norway', 'Denmark', 'Finland', 'Russia',
+  'Turkey', 'Greece', 'Romania', 'Bulgaria', 'Serbia', 'Albania', 'Bosnia and Herzegovina',
+  'United States', 'Canada', 'Brazil', 'Argentina', 'Mexico', 'China', 'Japan',
+  'India', 'Pakistan', 'Australia', 'South Africa', 'Other'
+]
+
 const initialData: PersonalProfileData = {
   dob: '',
   nationality: '',
@@ -44,12 +64,37 @@ export default function PersonalAdditionalInformationPage() {
   const [success, setSuccess] = useState(false)
   const [error, setError] = useState('')
 
-  const handleChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+  const handleChange = (e: React.ChangeEvent<HTMLInputElement | HTMLSelectElement>) => {
     const { name, value } = e.target
     setForm(p => ({ ...p, [name]: value }))
     setError('')
   }
 
+  const validateDateOfBirth = (dob: string) => {
+    if (!dob) return false
+    
+    const birthDate = new Date(dob)
+    const today = new Date()
+    
+    // Check if date is valid
+    if (isNaN(birthDate.getTime())) return false
+    
+    // Check if birth date is not in the future
+    if (birthDate > today) return false
+    
+    // Check minimum age (18 years)
+    const minDate = new Date()
+    minDate.setFullYear(today.getFullYear() - 18)
+    if (birthDate > minDate) return false
+    
+    // Check maximum age (120 years)
+    const maxDate = new Date()
+    maxDate.setFullYear(today.getFullYear() - 120)
+    if (birthDate < maxDate) return false
+    
+    return true
+  }
+
   const validate = () => {
     const requiredKeys: (keyof PersonalProfileData)[] = [
       'dob','nationality','street','postalCode','city','country','accountHolder','iban'
@@ -60,6 +105,13 @@ export default function PersonalAdditionalInformationPage() {
         return false
       }
     }
+    
+    // Date of birth validation
+    if (!validateDateOfBirth(form.dob)) {
+      setError('Ungültiges Geburtsdatum. Sie müssen mindestens 18 Jahre alt sein.')
+      return false
+    }
+    
     // very loose IBAN check
     if (!/^([A-Z]{2}\d{2}[A-Z0-9]{10,30})$/i.test(form.iban.replace(/\s+/g,''))) {
       setError('Ungültige IBAN.')
@@ -175,6 +227,8 @@ export default function PersonalAdditionalInformationPage() {
                     name="dob"
                     value={form.dob}
                     onChange={handleChange}
+                    min={new Date(new Date().getFullYear() - 120, 0, 1).toISOString().split('T')[0]}
+                    max={new Date(new Date().getFullYear() - 18, 11, 31).toISOString().split('T')[0]}
                     className="w-full rounded-lg border border-gray-300 px-3 py-2 text-sm focus:ring-2 focus:ring-indigo-500 focus:border-transparent"
                     required
                   />
@@ -183,14 +237,20 @@ export default function PersonalAdditionalInformationPage() {
                   <label className="block text-sm font-medium text-gray-700 mb-1">
                     Nationality *
                   </label>
-                  <input
+                  <select
                     name="nationality"
                     value={form.nationality}
                     onChange={handleChange}
-                    placeholder="e.g. German"
                     className="w-full rounded-lg border border-gray-300 px-3 py-2 text-sm focus:ring-2 focus:ring-indigo-500 focus:border-transparent"
                     required
-                  />
+                  >
+                    <option value="">Select nationality...</option>
+                    {NATIONALITIES.map(nationality => (
+                      <option key={nationality} value={nationality}>
+                        {nationality}
+                      </option>
+                    ))}
+                  </select>
                 </div>
                 <div className="sm:col-span-2 lg:col-span-3">
                   <label className="block text-sm font-medium text-gray-700 mb-1">
@@ -235,14 +295,20 @@ export default function PersonalAdditionalInformationPage() {
                   <label className="block text-sm font-medium text-gray-700 mb-1">
                     Country *
                   </label>
-                  <input
+                  <select
                     name="country"
                     value={form.country}
                     onChange={handleChange}
-                    placeholder="e.g. Germany"
                     className="w-full rounded-lg border border-gray-300 px-3 py-2 text-sm focus:ring-2 focus:ring-indigo-500 focus:border-transparent"
                     required
-                  />
+                  >
+                    <option value="">Select country...</option>
+                    {COUNTRIES.map(country => (
+                      <option key={country} value={country}>
+                        {country}
+                      </option>
+                    ))}
+                  </select>
                 </div>
               </div>
             </section>