diff --git a/src/components/Dialog/Dialog.tsx b/src/components/Dialog/Dialog.tsx
index d3a01d8b..cd4a818e 100644
--- a/src/components/Dialog/Dialog.tsx
+++ b/src/components/Dialog/Dialog.tsx
@@ -5,7 +5,7 @@ import {CloseButton} from '../CloseButton/CloseButton'
 
 type DialogProps = {
   open: boolean
-  close: () => void
+  close?: () => void
   title?: ReactNode
   contentText?: string
   children?: ReactNode
@@ -16,9 +16,11 @@ type DialogProps = {
 export const Dialog: FC<DialogProps> = ({open, close, title, contentText, children, actions}) => {
   return (
     <MuiDialog open={open} onClose={close}>
-      <Box position="absolute" top={16} right={16}>
-        <CloseButton size={30} onClick={close} invertColors />
-      </Box>
+      {close && (
+        <Box position="absolute" top={16} right={16}>
+          <CloseButton size={30} onClick={close} invertColors />
+        </Box>
+      )}
       {title && <DialogTitle variant="h2">{title}</DialogTitle>}
       {(contentText || children) && (
         <DialogContent>
@@ -26,7 +28,9 @@ export const Dialog: FC<DialogProps> = ({open, close, title, contentText, childr
           {children}
         </DialogContent>
       )}
-      {actions && <DialogActions>{actions}</DialogActions>}
+      {/* MUI aplikuje nejaky default spacing, ale u nas je to kontraproduktivne, lebo globalne v teme
+          mame `flexDirection:'row-reverse'`. preto `disableSpacing` */}
+      {actions && <DialogActions disableSpacing>{actions}</DialogActions>}
     </MuiDialog>
   )
 }
diff --git a/src/components/RegisterForm/RegisterForm.tsx b/src/components/RegisterForm/RegisterForm.tsx
index 25765332..362c78c1 100644
--- a/src/components/RegisterForm/RegisterForm.tsx
+++ b/src/components/RegisterForm/RegisterForm.tsx
@@ -2,15 +2,17 @@ import {Stack, Typography} from '@mui/material'
 import {useMutation} from '@tanstack/react-query'
 import axios, {AxiosError} from 'axios'
 import {useRouter} from 'next/router'
-import {FC} from 'react'
-import {SubmitHandler, useForm} from 'react-hook-form'
+import {FC, useState} from 'react'
+import {SubmitHandler, useForm, useFormState} from 'react-hook-form'
 
 import {FormInput} from '@/components/FormItems/FormInput/FormInput'
 import {IGeneralPostResponse} from '@/types/api/general'
 import {useSeminarInfo} from '@/utils/useSeminarInfo'
 
+import {useNavigationTrap} from '../../utils/useNavigationTrap'
 import {Button} from '../Clickable/Button'
 import {Link} from '../Clickable/Link'
+import {Dialog} from '../Dialog/Dialog'
 import {SchoolSubForm, SchoolSubFormValues} from '../SchoolSubForm/SchoolSubForm'
 
 interface RegisterFormValues extends SchoolSubFormValues {
@@ -48,6 +50,8 @@ export const RegisterForm: FC = () => {
     values: defaultValues,
   })
 
+  const {isDirty} = useFormState<RegisterFormValues>({control: control})
+
   const scrollToTop = () => {
     window.scrollTo({
       top: 0,
@@ -102,64 +106,101 @@ export const RegisterForm: FC = () => {
         return '* Zadaj telefónne číslo vo formáte +421 123 456 789 alebo +421123456789.'
     },
   }
+
+  const [dialogOpen, setDialogOpen] = useState(false)
+
+  const {continueNavigation} = useNavigationTrap({
+    shouldBlockNavigation: isDirty,
+    onNavigate: () => {
+      setDialogOpen(true)
+    },
+  })
+
   return (
-    <form onSubmit={handleSubmit(onSubmit)}>
-      <Stack gap={2}>
-        <FormInput
-          control={control}
-          name="email"
-          label="e-mail*"
-          rules={{
-            ...requiredRule,
-            pattern: {
-              value: /^[\w%+.-]+@[\d.a-z-]+\.[a-z]{2,}$/iu,
-              message: '* Vlož správnu emailovú adresu.',
-            },
-          }}
-        />
-        <FormInput
-          control={control}
-          name="password1"
-          label="heslo*"
-          type="password"
-          rules={{
-            ...requiredRule,
-            minLength: {
-              value: 8,
-              message: '* Toto heslo je príliš krátke. Musí obsahovať aspoň 8 znakov.',
-            },
-          }}
-        />
-        <FormInput
-          control={control}
-          name="password2"
-          label="potvrdenie hesla*"
-          type="password"
-          rules={{
-            ...requiredRule,
-            validate: (val) => {
-              if (val !== getValues().password1) return '* Zadané heslá sa nezhodujú.'
-            },
-          }}
-        />
-        <FormInput control={control} name="first_name" label="krstné meno*" rules={requiredRule} />
-        <FormInput control={control} name="last_name" label="priezvisko*" rules={requiredRule} />
-        <SchoolSubForm control={control} watch={watch} setValue={setValue} gap={2} />
-        <FormInput control={control} name="phone" label="telefónne číslo" rules={phoneRule} />
-        <FormInput control={control} name="parent_phone" label="telefónne číslo na rodiča" rules={phoneRule} />
-        <Typography variant="body2" fontWeight={800}>
-          * takto označené polia sú povinné
-        </Typography>
-        <Typography variant="body2">
-          Vyplnením a odoslaním registrácie beriem na vedomie, že moje osobné údaje budú spracované v súlade so zákonom
-          o ochrane osobných údajov. Bližšie informácie nájdete <Link href={`./gdpr`}>tu</Link>.
-        </Typography>
-        <Stack direction="row" justifyContent="flex-end" mt={3}>
-          <Button variant="button2" type="submit" onClick={scrollToTop}>
-            Registrovať
-          </Button>
+    <>
+      <Dialog
+        open={dialogOpen}
+        title="Neuložené zmeny"
+        contentText="Máš neuložené zmeny. Naozaj chceš opustiť stránku?"
+        actions={
+          <>
+            <Button variant="button2" onClick={continueNavigation}>
+              Opustiť stránku
+            </Button>
+            <Button
+              variant="button2"
+              onClick={() => {
+                setDialogOpen(false)
+              }}
+            >
+              Zostať na stránke
+            </Button>
+          </>
+        }
+      />
+
+      <form onSubmit={handleSubmit(onSubmit)}>
+        <Stack gap={2}>
+          <FormInput
+            control={control}
+            name="email"
+            label="e-mail*"
+            rules={{
+              ...requiredRule,
+              pattern: {
+                value: /^[\w%+.-]+@[\d.a-z-]+\.[a-z]{2,}$/iu,
+                message: '* Vlož správnu emailovú adresu.',
+              },
+            }}
+          />
+          <FormInput
+            control={control}
+            name="password1"
+            label="heslo*"
+            type="password"
+            rules={{
+              ...requiredRule,
+              minLength: {
+                value: 8,
+                message: '* Toto heslo je príliš krátke. Musí obsahovať aspoň 8 znakov.',
+              },
+            }}
+          />
+          <FormInput
+            control={control}
+            name="password2"
+            label="potvrdenie hesla*"
+            type="password"
+            rules={{
+              ...requiredRule,
+              validate: (val) => {
+                if (val !== getValues().password1) return '* Zadané heslá sa nezhodujú.'
+              },
+            }}
+          />
+          <FormInput control={control} name="first_name" label="krstné meno*" rules={requiredRule} />
+          <FormInput control={control} name="last_name" label="priezvisko*" rules={requiredRule} />
+          <SchoolSubForm control={control} watch={watch} setValue={setValue} gap={2} />
+          <FormInput control={control} name="phone" label="telefónne číslo" rules={phoneRule} />
+          <FormInput control={control} name="parent_phone" label="telefónne číslo na rodiča" rules={phoneRule} />
+          <Typography variant="body2" fontWeight={800}>
+            * takto označené polia sú povinné
+          </Typography>
+          <Typography variant="body2">
+            Vyplnením a odoslaním registrácie beriem na vedomie, že moje osobné údaje budú spracované v súlade so
+            zákonom o ochrane osobných údajov. Bližšie informácie
+            <Link href={`./gdpr`} target="_blank">
+              nájdete tu
+            </Link>
+            .
+          </Typography>
+          <Stack direction="row" justifyContent="flex-end" mt={3}>
+            <Button variant="button2" type="submit" onClick={scrollToTop}>
+              Registrovať
+            </Button>
+          </Stack>
         </Stack>
-      </Stack>
-    </form>
+      </form>
+    </>
   )
 }
diff --git a/src/utils/useNavigationTrap.ts b/src/utils/useNavigationTrap.ts
new file mode 100644
index 00000000..0cc1a5ce
--- /dev/null
+++ b/src/utils/useNavigationTrap.ts
@@ -0,0 +1,52 @@
+import {useRouter} from 'next/router'
+import {useCallback, useEffect, useRef} from 'react'
+
+interface NavigationTrapProps {
+  shouldBlockNavigation: boolean
+  onNavigate: () => void
+}
+
+export const useNavigationTrap = ({shouldBlockNavigation, onNavigate}: NavigationTrapProps) => {
+  const router = useRouter()
+
+  const currentPath = router.asPath
+  const nextPath = useRef('')
+  const navConfirmed = useRef(false)
+
+  const killNavigation = useCallback(() => {
+    router.events.emit('routeChangeError', '', '', {shallow: false})
+
+    // eslint-disable-next-line no-throw-literal
+    throw 'Canceling navigation due to unsaved changes in the page'
+  }, [router])
+
+  useEffect(() => {
+    const pageNavigate = (path: string) => {
+      if (navConfirmed.current) return
+      if (shouldBlockNavigation && path !== currentPath) {
+        nextPath.current = path
+        onNavigate()
+        killNavigation()
+      }
+    }
+
+    const pageExit = (e: BeforeUnloadEvent) => {
+      e.preventDefault()
+    }
+
+    router.events.on('routeChangeStart', pageNavigate)
+    window.addEventListener('beforeunload', pageExit)
+
+    return () => {
+      router.events.off('routeChangeStart', pageNavigate)
+      window.removeEventListener('beforeunload', pageExit)
+    }
+  }, [shouldBlockNavigation, currentPath, killNavigation, onNavigate, router.events])
+
+  const continueNavigation = () => {
+    navConfirmed.current = true
+    router.push(nextPath.current)
+  }
+
+  return {nextPath, continueNavigation}
+}