diff --git a/firefox-ios/Client/Frontend/Autofill/CreditCard/CreditCardSettingsView/CreditCardInputViewModel.swift b/firefox-ios/Client/Frontend/Autofill/CreditCard/CreditCardSettingsView/CreditCardInputViewModel.swift
index 60a098cf8e9a..ec634be7b422 100644
--- a/firefox-ios/Client/Frontend/Autofill/CreditCard/CreditCardSettingsView/CreditCardInputViewModel.swift
+++ b/firefox-ios/Client/Frontend/Autofill/CreditCard/CreditCardSettingsView/CreditCardInputViewModel.swift
@@ -253,7 +253,7 @@ class CreditCardInputViewModel: ObservableObject {
     }
 
     func removeCreditCard(creditCard: CreditCard?,
-                          completion: @escaping (CreditCardModifiedStatus, Bool) -> Void) {
+                          completion: @escaping @Sendable (CreditCardModifiedStatus, Bool) -> Void) {
         guard let currentCreditCard = creditCard,
               !currentCreditCard.guid.isEmpty else {
             completion(.none, false)
diff --git a/firefox-ios/Client/Frontend/Autofill/CreditCard/CreditCardSettingsView/CreditCardSettingsViewModel.swift b/firefox-ios/Client/Frontend/Autofill/CreditCard/CreditCardSettingsView/CreditCardSettingsViewModel.swift
index 0ad63dbb8d33..43e9bd90291c 100644
--- a/firefox-ios/Client/Frontend/Autofill/CreditCard/CreditCardSettingsView/CreditCardSettingsViewModel.swift
+++ b/firefox-ios/Client/Frontend/Autofill/CreditCard/CreditCardSettingsView/CreditCardSettingsViewModel.swift
@@ -18,7 +18,8 @@ enum CreditCardSettingsState: String, Equatable, CaseIterable {
     case list = "List"
 }
 
-class CreditCardSettingsViewModel {
+// FIXME: FXIOS-14006 Class is not thread safe
+final class CreditCardSettingsViewModel: @unchecked Sendable {
     var autofill: RustAutofill?
     var profile: Profile
     let windowUUID: WindowUUID
@@ -67,7 +68,7 @@ class CreditCardSettingsViewModel {
         }
     }
 
-    func getCreditCardList(_ completionHandler: @escaping ([CreditCard]?) -> Void) {
+    func getCreditCardList(_ completionHandler: @escaping @Sendable ([CreditCard]?) -> Void) {
         autofill?.listCreditCards(completion: { creditCards, error in
             guard let cards = creditCards,
                   error == nil else {