diff --git a/src/main/java/com/acquirex/approval/dto/DtoClasses.java b/src/main/java/com/acquirex/approval/dto/DtoClasses.java
new file mode 100644
index 0000000..8d843a6
--- /dev/null
+++ b/src/main/java/com/acquirex/approval/dto/DtoClasses.java
@@ -0,0 +1,82 @@
+package com.acquirex.approval.dto;
+
+import com.acquirex.approval.domain.ApprovalStatus;
+import jakarta.validation.constraints.DecimalMin;
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
+import java.math.BigDecimal;
+import java.time.LocalDateTime;
+
+/**
+ * DTO for card acquisition approval request.
+ * Uses Jakarta Validation annotations (Spring Boot 3 requirement).
+ */
+public class ApprovalRequest {
+    @NotBlank(message = "Request ID is required")
+    private String requestId;
+
+    @NotBlank(message = "Card number is required")
+    private String cardNumber;
+
+    @NotBlank(message = "Merchant ID is required")
+    private String merchantId;
+
+    @NotNull(message = "Amount is required")
+    @DecimalMin(value = "0.01", message = "Amount must be greater than zero")
+    private BigDecimal amount;
+
+    public ApprovalRequest() {}
+
+    public ApprovalRequest(String requestId, String cardNumber, String merchantId, BigDecimal amount) {
+        this.requestId = requestId;
+        this.cardNumber = cardNumber;
+        this.merchantId = merchantId;
+        this.amount = amount;
+    }
+
+    public String getRequestId() { return requestId; }
+    public void setRequestId(String requestId) { this.requestId = requestId; }
+    public String getCardNumber() { return cardNumber; }
+    public void setCardNumber(String cardNumber) { this.cardNumber = cardNumber; }
+    public String getMerchantId() { return merchantId; }
+    public void setMerchantId(String merchantId) { this.merchantId = merchantId; }
+    public BigDecimal getAmount() { return amount; }
+    public void setAmount(BigDecimal amount) { this.amount = amount; }
+}
+
+/**
+ * DTO for card acquisition approval response.
+ */
+class ApprovalResponse {
+    private Long id;
+    private String requestId;
+    private ApprovalStatus status;
+    private BigDecimal amount;
+    private LocalDateTime processedAt;
+    private String message;
+
+    public ApprovalResponse() {}
+
+    public ApprovalResponse(Long id, String requestId, ApprovalStatus status,
+                            BigDecimal amount, LocalDateTime processedAt, String message) {
+        this.id = id;
+        this.requestId = requestId;
+        this.status = status;
+        this.amount = amount;
+        this.processedAt = processedAt;
+        this.message = message;
+    }
+
+    public Long getId() { return id; }
+    public void setId(Long id) { this.id = id; }
+    public String getRequestId() { return requestId; }
+    public void setRequestId(String requestId) { this.requestId = requestId; }
+    public ApprovalStatus getStatus() { return status; }
+    public void setStatus(ApprovalStatus status) { this.status = status; }
+    public BigDecimal getAmount() { return amount; }
+    public void setAmount(BigDecimal amount) { this.amount = amount; }
+    public LocalDateTime getProcessedAt() { return processedAt; }
+    public void setProcessedAt(LocalDateTime processedAt) { this.processedAt = processedAt; }
+    public String getMessage() { return message; }
+    public void setMessage(String message) { this.message = message; }
+}
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