diff --git a/src/components/deal/DealModal.vue b/src/components/deal/DealModal.vue
index c8f1910..c23b7d8 100644
--- a/src/components/deal/DealModal.vue
+++ b/src/components/deal/DealModal.vue
@@ -91,6 +91,7 @@
                 optionValue="id"
                 placeholder="Выберите заявку"
                 :filter="true"
+                :class="{ 'p-invalid': errors.req_side_two }"
                 @filter="filterRequisitionsList"
                 :virtualScrollerOptions="{ itemSize: 40 }"
             >
@@ -98,6 +99,7 @@
                 <DropdownIcon />
               </template>
             </Select>
+            <small v-if="errors.req_side_two" class="p-error">{{ errorMessages.req_side_two }}</small>
           </div>
 
           <div class="form__item flex flex-col gap-1 w-full mb-3">
@@ -744,6 +746,7 @@ const errors = ref({
   title: false,
   side_one: false,
   side_two: false,
+  req_side_two: false,
   deal_date: false
 });
 
@@ -751,9 +754,45 @@ const errorMessages = ref({
   title: '',
   side_one: '',
   side_two: '',
+  req_side_two: '',
   deal_date: ''
 });
 
+watch(() => deal.value.title, () => {
+  if (errors.value.title) {
+    errors.value.title = false;
+    errorMessages.value.title = '';
+  }
+});
+
+watch(() => deal.value.side_one, () => {
+  if (errors.value.side_one) {
+    errors.value.side_one = false;
+    errorMessages.value.side_one = '';
+  }
+});
+
+watch(() => deal.value.side_two, () => {
+  if (errors.value.side_two) {
+    errors.value.side_two = false;
+    errorMessages.value.side_two = '';
+  }
+});
+
+watch(() => deal.value.deal_date, () => {
+  if (errors.value.deal_date) {
+    errors.value.deal_date = false;
+    errorMessages.value.deal_date = '';
+  }
+});
+
+watch(selectedRequisitionSideTwoId, () => {
+  if (errors.value.req_side_two) {
+    errors.value.req_side_two = false;
+    errorMessages.value.req_side_two = '';
+  }
+});
+
 const validateForm = () => {
   let isValid = true;
 
@@ -791,6 +830,16 @@ const validateForm = () => {
     errorMessages.value.side_two = '';
   }
 
+  // Валидация заявки стороны 2
+  if (!selectedRequisitionSideTwoId.value) {
+    errors.value.req_side_two = true;
+    errorMessages.value.req_side_two = 'Выберите заявку стороны 2';
+    isValid = false;
+  } else {
+    errors.value.req_side_two = false;
+    errorMessages.value.req_side_two = '';
+  }
+
   // Валидация даты сделки
   if (!deal.value.deal_date) {
     errors.value.deal_date = true;
@@ -1539,9 +1588,19 @@ defineExpose({ closeModel });
 
     .form__item {
       .p-invalid {
+        border-color: #e24c4c !important;
+        box-shadow: 0 0 0 1px #e24c4c;
+      }
+
+      .p-error {
         color: #e24c4c;
       }
 
+      .error-highlight {
+        animation: shake 0.4s ease;
+        box-shadow: 0 0 0 2px #e24c4c;
+      }
+
       label {
         font-size: 16px;
         font-weight: 400;
@@ -1706,4 +1765,12 @@ defineExpose({ closeModel });
   background: #f2f2f2;
 }
 
+@keyframes shake {
+  0%, 100% { transform: translateX(0); }
+  20% { transform: translateX(-4px); }
+  40% { transform: translateX(4px); }
+  60% { transform: translateX(-4px); }
+  80% { transform: translateX(4px); }
+}
+
 </style>