diff --git a/data_providers/rsa.js b/data_providers/rsa.js
index 1a74743..8159f66 100644
--- a/data_providers/rsa.js
+++ b/data_providers/rsa.js
@@ -13,9 +13,9 @@ class RsaProvider {
 			method: 'POST',
 			body: new URLSearchParams({
 				requestDate: dateStr,
-				licensePlate: number,
-				vin: vin,
-				isBsoRequest: false,
+				licensePlate: number ?? '',
+				vin: vin ?? '',
+				isBsoRequest: 'false',
 				captcha: token
 			}),
 			agent: httpsAgent
@@ -39,9 +39,9 @@ class RsaProvider {
 			method: 'POST',
 			body: new URLSearchParams({
 				requestDate: dateStr,
-				licensePlate: number,
-				vin: vin,
-				isBsoRequest: false,
+				licensePlate: number ?? '',
+				vin: vin ?? '',
+				isBsoRequest: 'false',
 				processId
 			}),
 			agent: httpsAgent