diff --git a/src/Objects/MemOrderApp.php b/src/Objects/MemOrderApp.php
index c01d8f4..beadda5 100644
--- a/src/Objects/MemOrderApp.php
+++ b/src/Objects/MemOrderApp.php
@@ -9,7 +9,7 @@
 class MemOrderApp
 {
     //Номер документа (поле 3).
-    protected string $DocNo;
+    protected ?string $DocNo = null;
     //Дата составления (поле 4).
     protected string $DocDate;
     //Свободное поле (поле 5)
@@ -39,7 +39,7 @@ class MemOrderApp
     //Свободное поле (поле 20)
     protected ?string $SpareField20 = null;
 
-    public function getDocNo(): string
+    public function getDocNo(): ?string
     {
         return $this->DocNo;
     }
diff --git a/src/Objects/PaymentDataType.php b/src/Objects/PaymentDataType.php
index 3abfdf0..181642d 100644
--- a/src/Objects/PaymentDataType.php
+++ b/src/Objects/PaymentDataType.php
@@ -7,7 +7,7 @@
 class PaymentDataType
 {
     //Номер документа (поле 3).
-    protected string $DocNo;
+    protected ?string $DocNo = null;
     //Дата составления (поле 4).
     protected string $DocDate;
     //Сумма документа (поле 7).
@@ -31,7 +31,7 @@ class PaymentDataType
     //Назначение платежа (поле 24).
     protected ?string $Purpose = null;
 
-    public function getDocNo(): string
+    public function getDocNo(): ?string
     {
         return $this->DocNo;
     }
@@ -86,7 +86,7 @@ public function getPurpose(): ?string
         return $this->Purpose;
     }
 
-    public function setDocNo(string $docNo): static
+    public function setDocNo(?string $docNo): static
     {
         $this->DocNo = $docNo;
         return $this;
diff --git a/tests/Fixture/xml/statement_empty_doc_no.xml b/tests/Fixture/xml/statement_empty_doc_no.xml
new file mode 100644
index 0000000..082350b
--- /dev/null
+++ b/tests/Fixture/xml/statement_empty_doc_no.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<Statement xmlns="http://directbank.1c.ru/XMLSchema" id="11111111-2222-3333-4444-555555555555" formatVersion="2.2.2" creationDate="2024-01-02T01:50:16.556+03:00">
+<Sender bic="044525888" name="АО &quot;БАНК&quot;"/><Recipient id="40702810500000000001" name="ООО &quot;КЛИЕНТ&quot;" inn="7700000001" kpp="770001001"/>
+<Data><StatementType>1</StatementType><DateFrom>2024-01-01T00:00:00Z</DateFrom><DateTo>2024-01-02T00:00:00Z</DateTo><Account>40702810500000000001</Account><Bank><BIC>044525888</BIC><Name>АО "БАНК"</Name><CorrespAcc>30101810400000000888</CorrespAcc></Bank><OpeningBalance>0</OpeningBalance><TotalDebits>0</TotalDebits><TotalCredits>100.50</TotalCredits><ClosingBalance>100.50</ClosingBalance>
+<OperationInfo><PayDoc id="SBP0000000000001" docKind="10"><PayDocRu><DocNo/><DocDate>2024-01-02</DocDate><Sum>100.50</Sum><Payer><Name>АО "БАНК"</Name><INN>7700000002</INN><Account>30233810000000000001</Account><Bank><BIC>044525888</BIC><Name>АО "БАНК" г Москва</Name><CorrespAcc>30101810400000000888</CorrespAcc></Bank></Payer><Payee><Name>ООО "КЛИЕНТ"</Name><INN>7700000001</INN><KPP>770001001</KPP><Account>40702810500000000001</Account><Bank><BIC>044525888</BIC><Name>АО "БАНК"</Name></Bank></Payee><TransitionKind>01</TransitionKind><Priority>5</Priority><Purpose>C000000000000001 Возм. по согл. в СБП № 7700000001 от 2022-01-01</Purpose></PayDocRu></PayDoc><DC>2</DC><Date>2024-01-02</Date></OperationInfo>
+</Data></Statement>
diff --git a/tests/Objects/StatementTest.php b/tests/Objects/StatementTest.php
index 6853984..ccd2474 100644
--- a/tests/Objects/StatementTest.php
+++ b/tests/Objects/StatementTest.php
@@ -181,6 +181,55 @@ public function testCheckWithSingleDetails()
         }
     }
 
+    public function payDocWithoutDocNoProvider(): array
+    {
+        return [
+            'no element' => [''],
+            'empty element' => ['<DocNo/>'],
+        ];
+    }
+
+    /**
+     * Банки присылают в выписке документы без номера, хотя по XSD он обязателен
+     *
+     * @dataProvider payDocWithoutDocNoProvider
+     */
+    public function testPayDocWithoutDocNo(string $docNo)
+    {
+        $xml = str_replace(
+            '<PayDocRu><DocNo>1</DocNo>',
+            '<PayDocRu>' . $docNo,
+            file_get_contents(__DIR__ . '/../Fixture/xml/statement_all_doc_kinds.xml')
+        );
+
+        $statement = new Statement();
+        $statement->mapFromXml($xml);
+
+        $payDocRu = $statement->getData()->getOperationInfo()[0]->getPayDoc()->getPayDocRu();
+        $this->assertNull($payDocRu->getDocNo());
+        $this->assertSame(1.5, $payDocRu->getSum());
+    }
+
+    /**
+     * Возмещение по СБП от банка приходит с пустым номером документа,
+     * фрагмент реальной выписки с заменёнными реквизитами
+     */
+    public function testSbpRefundWithEmptyDocNo()
+    {
+        $xml = file_get_contents(__DIR__ . '/../Fixture/xml/statement_empty_doc_no.xml');
+
+        $this->assertValid($xml);
+
+        $statement = new Statement();
+        $statement->mapFromXml($xml);
+
+        $payDocRu = $statement->getData()->getOperationInfo()[0]->getPayDoc()->getPayDocRu();
+        $this->assertNull($payDocRu->getDocNo());
+        $this->assertSame('2024-01-02', $payDocRu->getDocDate());
+        $this->assertSame(100.5, $payDocRu->getSum());
+        $this->assertSame('7700000002', $payDocRu->getPayer()->getINN());
+    }
+
     public function roundTripProvider(): array
     {
         return [