diff --git a/sipa/blueprints/usersuite.py b/sipa/blueprints/usersuite.py
index cdb99716..017ddf3a 100644
--- a/sipa/blueprints/usersuite.py
+++ b/sipa/blueprints/usersuite.py
@@ -4,6 +4,7 @@
 import logging
 from datetime import datetime
 from decimal import Decimal
+from functools import partial
 from schwifty import IBAN
 
 from babel.numbers import format_currency
@@ -669,20 +670,16 @@ def request_repayment_confirm():
     """
 
     beneficiary = request.args.get("beneficiary", None)
-    iban = request.args.get("iban", None, lambda x: IBAN(x, validate_bban=True))
-    amount = request.args.get("amount", None, lambda x: Decimal(x))
+    iban = request.args.get("iban", None, partial(IBAN, validate_bban=True))
+    amount = request.args.get("amount", None, Decimal)
 
     form = RequestRepaymentConfirmForm()
 
     if None not in (beneficiary, iban, amount):
         balance = current_user.finance_information.balance.raw_value
-        iban_str = str(iban)
 
         form.beneficiary.data = beneficiary
-        # Insert a space every 4 characters of the IBAN
-        form.iban.data = " ".join(
-            iban_str[i : i + 4] for i in range(0, len(iban_str), 4)
-        )
+        form.iban.data = iban.formatted
         form.bic.data = str(iban.bic)
         form.bank.data = iban.bank_name
         form.amount.data = amount