diff --git a/src/components/TransactionCreate.vue b/src/components/TransactionCreate.vue
index fc249a3..0577674 100644
--- a/src/components/TransactionCreate.vue
+++ b/src/components/TransactionCreate.vue
@@ -14,11 +14,12 @@ import TransactionType from '@/enums/TransactionType'
 import TransactionTag, { TransactionTagLabel } from '@/enums/TransactionTag'
 import exchangeService from '@/services/ExchangeService'
 import transactionService from '@/services/TransactionService'
-import queueNotifService from '@/services/QueueNotifService'
 import mapService from '@/services/MapService'
 import { money } from '@/utils/format'
 import { findContrastColor } from '@/utils'
 import notif from '@/utils/notif'
+import { validateAndNotify } from '@/utils/validate'
+import { transactionFormSchema, MAX_TRANSACTION_AMOUNT } from '@/schemas/transaction'
 import FabButton from '@/components/FabButton.vue'
 import TransactionSplit from '@/components/TransactionSplit.vue'
 import TransactionTagUpdate from '@/components/TransactionTagUpdate.vue'
@@ -46,7 +47,7 @@ const date = ref(today)
 const currency = ref<ICurrency | null>(null)
 const payBy = ref('')
 const payFor = reactive<ISplit[]>([])
-const maxAmount = 1_000_000
+const maxAmount = MAX_TRANSACTION_AMOUNT
 const displayLocationModal = ref(false)
 const isSetLocation = ref(false)
 const location = ref<ILocation | null>(null)
@@ -120,23 +121,12 @@ const validLocation = async () => {
 const validate = (): boolean => {
   const el = document.querySelector(':focus') as HTMLInputElement | null
   el?.blur()
-  if (!name.value || !amount.value || !payBy.value || (!currency.value && !date.value && payFor.length === 0)) {
-    if (amount.value === 0) {
-      queueNotifService.error('Le montant doit être supérieur à 0.')
-    } else {
-      queueNotifService.error('Tous les champs sont requis.')
-    }
-    return false
-  }
-  if (isNaN(amount.value) || amount.value > maxAmount) {
-    queueNotifService.error(`Veuillez saisir un montant numérique inférieur à ${money(maxAmount, currency.value)}.`)
-    return false
-  }
-  if (amount.value < 0) {
-    queueNotifService.error('Le montant doit être supérieur à 0.')
-    return false
-  }
-  return true
+  return validateAndNotify(
+    transactionFormSchema,
+    { name: name.value, amount: amount.value, payBy: payBy.value },
+    t,
+    { amount: { max: money(maxAmount, currency.value) } }
+  )
 }
 
 const submitTransaction = async (finish: () => void) => {
diff --git a/src/views/User.vue b/src/views/User.vue
index 9d94099..7e99794 100644
--- a/src/views/User.vue
+++ b/src/views/User.vue
@@ -7,6 +7,8 @@ import type IUser from '@/models/IUser'
 import userService from '@/services/UserService'
 import queueNotifService from '@/services/QueueNotifService'
 import { slug } from '@/utils'
+import { validateAndNotify } from '@/utils/validate'
+import { signupFormSchema } from '@/schemas/user'
 import LangChanger from '@/components/LangChanger.vue'
 import AccountList from '@/components/AccountList.vue'
 import ConfirmButton from '@/components/ConfirmButton.vue'
@@ -51,17 +53,16 @@ const signin = async () => {
   isLoading.value = false
 }
 
-const validateRegistration = (): boolean => {
-  if (!userId.value) {
-    queueNotifService.error('Un pseudo est obligatoire.')
-    return false
-  }
-  if (password.value !== confirmPassword.value) {
-    queueNotifService.error('Les mots de passe doivent être identique.')
-    return false
-  }
-  return true
-}
+const validateRegistration = (): boolean =>
+  validateAndNotify(
+    signupFormSchema,
+    {
+      userId: userId.value,
+      password: password.value,
+      confirmPassword: confirmPassword.value
+    },
+    t
+  )
 
 const register = async (confirmed: boolean) => {
   if (!validateRegistration()) return
diff --git a/src/views/accounts/AccountNew.vue b/src/views/accounts/AccountNew.vue
index d21ab57..4018c6f 100644
--- a/src/views/accounts/AccountNew.vue
+++ b/src/views/accounts/AccountNew.vue
@@ -11,6 +11,8 @@ import type IUser from '@/models/IUser'
 import accountService from '@/services/AccountService'
 import queueNotifService from '@/services/QueueNotifService'
 import { slug } from '@/utils'
+import { validateAndNotify } from '@/utils/validate'
+import { accountFormSchema } from '@/schemas/account'
 import ColorPicker from '@/components/ColorPicker.vue'
 import AccountUserNew from '@/components/AccountUserNew.vue'
 
@@ -55,27 +57,13 @@ watch(
 )
 
 const validate = (allUsers: IUser[]): boolean => {
-  if (!name.value) {
-    queueNotifService.error('Le nom doit être rempli.')
-    return false
-  }
   const aliases = allUsers.map((u) => (u.alias ? u.alias.toLowerCase() : ''))
-  if (aliases.length === 0) {
-    queueNotifService.error('Au moins une personne doit être ajoutée au compte.')
-    return false
-  }
-  if (aliases.length !== new Set(aliases).size) {
-    queueNotifService.error('Les alias doivent être uniques.')
-    return false
-  }
-  if (user.value) {
-    const userIds = allUsers.map((u) => u.userId)
-    if (userIds.length !== new Set(userIds).size) {
-      queueNotifService.error('Les identifiants doivent être uniques.')
-      return false
-    }
-  }
-  return true
+  const userIds = user.value ? allUsers.map((u) => u.userId) : undefined
+  return validateAndNotify(
+    accountFormSchema,
+    { name: name.value, aliases, userIds },
+    t
+  )
 }
 
 const submitAccount = async () => {