diff --git a/src/PayoneCommercePlatform/Sdk/Models/PaymentInformationResponse.php b/src/PayoneCommercePlatform/Sdk/Models/PaymentInformationResponse.php
index 8e8636f..0765d5a 100644
--- a/src/PayoneCommercePlatform/Sdk/Models/PaymentInformationResponse.php
+++ b/src/PayoneCommercePlatform/Sdk/Models/PaymentInformationResponse.php
@@ -195,7 +195,7 @@ public function setTerminalId(?string $terminalId): self
         return $this;
     }
 
-    public function getCardAcceptorId(): string
+    public function getCardAcceptorId(): ?string
     {
         return $this->cardAcceptorId;
     }
@@ -206,7 +206,7 @@ public function setCardAcceptorId(string $cardAcceptorId): self
         return $this;
     }
 
-    public function getMerchantReference(): string
+    public function getMerchantReference(): ?string
     {
         return $this->merchantReference;
     }
diff --git a/src/PayoneCommercePlatform/Sdk/Models/ProcessingMandateInformation.php b/src/PayoneCommercePlatform/Sdk/Models/ProcessingMandateInformation.php
index ddfc6bc..be0119b 100644
--- a/src/PayoneCommercePlatform/Sdk/Models/ProcessingMandateInformation.php
+++ b/src/PayoneCommercePlatform/Sdk/Models/ProcessingMandateInformation.php
@@ -56,7 +56,7 @@ public function __construct(
     }
 
     // Getters and Setters
-    public function getBankAccountIban(): BankAccountInformation
+    public function getBankAccountIban(): ?BankAccountInformation
     {
         return $this->bankAccountIban;
     }
@@ -67,7 +67,7 @@ public function setBankAccountIban(BankAccountInformation $bankAccountIban): sel
         return $this;
     }
 
-    public function getRecurrenceType(): MandateRecurrenceType
+    public function getRecurrenceType(): ?MandateRecurrenceType
     {
         return $this->recurrenceType;
     }
@@ -78,7 +78,7 @@ public function setRecurrenceType(MandateRecurrenceType $recurrenceType): self
         return $this;
     }
 
-    public function getUniqueMandateReference(): string
+    public function getUniqueMandateReference(): ?string
     {
         return $this->uniqueMandateReference;
     }
@@ -89,7 +89,7 @@ public function setUniqueMandateReference(string $uniqueMandateReference): self
         return $this;
     }
 
-    public function getDateOfSignature(): string
+    public function getDateOfSignature(): ?string
     {
         return $this->dateOfSignature;
     }
@@ -100,7 +100,7 @@ public function setDateOfSignature(string $dateOfSignature): self
         return $this;
     }
 
-    public function getCreditorId(): string
+    public function getCreditorId(): ?string
     {
         return $this->creditorId;
     }