diff --git a/src/main/java/com/augment/cbsa/web/delacc/DelaccController.java b/src/main/java/com/augment/cbsa/web/delacc/DelaccController.java
index 77ce1ff..ee6832c 100644
--- a/src/main/java/com/augment/cbsa/web/delacc/DelaccController.java
+++ b/src/main/java/com/augment/cbsa/web/delacc/DelaccController.java
@@ -1,9 +1,11 @@
 package com.augment.cbsa.web.delacc;
 
+import com.augment.cbsa.config.CbsaProperties;
 import com.augment.cbsa.domain.AccountDetails;
 import com.augment.cbsa.domain.DelaccRequest;
 import com.augment.cbsa.domain.DelaccResult;
 import com.augment.cbsa.service.DelaccService;
+import com.augment.cbsa.web.delacc.dto.DelaccCommareaRequestDto;
 import com.augment.cbsa.web.delacc.dto.DelaccCommareaResponseDto;
 import com.augment.cbsa.web.delacc.dto.DelaccRequestDto;
 import com.augment.cbsa.web.delacc.dto.DelaccResponseDto;
@@ -33,9 +35,11 @@ public class DelaccController {
     private static final DateTimeFormatter COBOL_DATE_FORMATTER = DateTimeFormatter.ofPattern("ddMMyyyy", Locale.ROOT);
 
     private final DelaccService delaccService;
+    private final CbsaProperties cbsaProperties;
 
-    public DelaccController(DelaccService delaccService) {
+    public DelaccController(DelaccService delaccService, CbsaProperties cbsaProperties) {
         this.delaccService = Objects.requireNonNull(delaccService, "delaccService must not be null");
+        this.cbsaProperties = Objects.requireNonNull(cbsaProperties, "cbsaProperties must not be null");
     }
 
     @DeleteMapping("/remove/{accno}")
@@ -48,6 +52,15 @@ public ResponseEntity<?> delete(
     ) {
         Objects.requireNonNull(requestDto, "requestDto must not be null");
 
+        // The body's DelAccAccno and DelAccScode are optional (patterns allow ""
+        // / null). When present they must agree with the path account number
+        // and the configured branch sortcode so a misaddressed request can
+        // never silently delete the path target.
+        ProblemDetail mismatch = validateBodyAgainstPath(requestDto.delAcc(), accountNumber);
+        if (mismatch != null) {
+            return ResponseEntity.badRequest().body(mismatch);
+        }
+
         DelaccResult result = delaccService.delete(new DelaccRequest(accountNumber));
         if (!result.deleteSuccess()) {
             return ResponseEntity.status(failureStatus(result)).body(failureBody(result));
@@ -56,6 +69,26 @@ public ResponseEntity<?> delete(
         return ResponseEntity.ok(toResponse(result));
     }
 
+    private ProblemDetail validateBodyAgainstPath(DelaccCommareaRequestDto delAcc, long pathAccountNumber) {
+        Long bodyAccno = delAcc.delAccAccno();
+        if (bodyAccno != null && bodyAccno != pathAccountNumber) {
+            return mismatch("Body DelAccAccno does not match path accno.");
+        }
+        String bodyScode = delAcc.delAccScode();
+        if (bodyScode != null && !bodyScode.isEmpty()
+                && !bodyScode.equals(cbsaProperties.sortcode())) {
+            return mismatch("Body DelAccScode does not match the configured branch sortcode.");
+        }
+        return null;
+    }
+
+    private ProblemDetail mismatch(String detail) {
+        ProblemDetail problemDetail = ProblemDetail.forStatus(HttpStatus.BAD_REQUEST);
+        problemDetail.setTitle("Validation failed");
+        problemDetail.setDetail(detail);
+        return problemDetail;
+    }
+
     private HttpStatus failureStatus(DelaccResult result) {
         if (result.isNotFoundFailure()) {
             return HttpStatus.NOT_FOUND;
diff --git a/src/test/java/com/augment/cbsa/web/delacc/DelaccControllerWebMvcTest.java b/src/test/java/com/augment/cbsa/web/delacc/DelaccControllerWebMvcTest.java
index a5ed105..5dd5214 100644
--- a/src/test/java/com/augment/cbsa/web/delacc/DelaccControllerWebMvcTest.java
+++ b/src/test/java/com/augment/cbsa/web/delacc/DelaccControllerWebMvcTest.java
@@ -10,9 +10,11 @@
 import java.time.LocalDate;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
 import org.springframework.boot.test.mock.mockito.MockBean;
 import org.springframework.context.annotation.Import;
+import org.springframework.test.context.TestPropertySource;
 import org.springframework.test.web.servlet.MockMvc;
 
 import static org.hamcrest.Matchers.containsString;
@@ -26,6 +28,8 @@
 
 @WebMvcTest(DelaccController.class)
 @Import(CbsaExceptionHandler.class)
+@EnableConfigurationProperties(com.augment.cbsa.config.CbsaProperties.class)
+@TestPropertySource(properties = "cbsa.sortcode=987654")
 class DelaccControllerWebMvcTest {
 
     @Autowired
@@ -88,6 +92,47 @@ void requestValidationFailuresRemainProblemDetails() throws Exception {
                 .andExpect(jsonPath("$.title").value("Validation failed"));
     }
 
+    @Test
+    void rejectsBodyAccnoThatMismatchesPath() throws Exception {
+        String body = requestJson().replace("\"DelAccAccno\": 12345678", "\"DelAccAccno\": 99999999");
+        mockMvc.perform(delete("/api/v1/delacc/remove/12345678").contentType(APPLICATION_JSON).content(body))
+                .andExpect(status().isBadRequest())
+                .andExpect(jsonPath("$.title").value("Validation failed"))
+                .andExpect(jsonPath("$.detail").value("Body DelAccAccno does not match path accno."));
+    }
+
+    @Test
+    void rejectsBodyScodeThatMismatchesConfiguredSortcode() throws Exception {
+        String body = requestJson().replace("\"DelAccScode\": \"987654\"", "\"DelAccScode\": \"123456\"");
+        mockMvc.perform(delete("/api/v1/delacc/remove/12345678").contentType(APPLICATION_JSON).content(body))
+                .andExpect(status().isBadRequest())
+                .andExpect(jsonPath("$.title").value("Validation failed"))
+                .andExpect(jsonPath("$.detail").value("Body DelAccScode does not match the configured branch sortcode."));
+    }
+
+    @Test
+    void allowsEmptyOrNullBodyKeyFields() throws Exception {
+        when(delaccService.delete(new DelaccRequest(12345678L))).thenReturn(DelaccResult.success(new AccountDetails(
+                "987654",
+                10L,
+                12345678L,
+                "ISA",
+                new BigDecimal("1.50"),
+                LocalDate.of(2024, 1, 2),
+                new BigDecimal("250.00"),
+                LocalDate.of(2024, 2, 3),
+                LocalDate.of(2024, 3, 4),
+                new BigDecimal("1500.25"),
+                new BigDecimal("1499.75")
+        )));
+
+        String body = requestJson()
+                .replace("\"DelAccAccno\": 12345678,", "")
+                .replace("\"DelAccScode\": \"987654\"", "\"DelAccScode\": \"\"");
+        mockMvc.perform(delete("/api/v1/delacc/remove/12345678").contentType(APPLICATION_JSON).content(body))
+                .andExpect(status().isOk());
+    }
+
     @Test
     void redactsAbendExceptionMessageFromResponseBody() throws Exception {
         when(delaccService.delete(new DelaccRequest(12345678L)))