diff --git a/src/PassKit/PKPayLaterView.cs b/src/PassKit/PKPayLaterView.cs
index 49c26d19733e..15457dc99641 100644
--- a/src/PassKit/PKPayLaterView.cs
+++ b/src/PassKit/PKPayLaterView.cs
@@ -1,72 +1,79 @@
-// Can be uncommented when this issue is resolved: # https://github.com/xamarin/xamarin-macios/issues/19271
+#nullable enable
 
-// #nullable enable
+#if IOS && !__MACCATALYST__
 
-// #if IOS && !__MACCATALYST__
+using System;
+using System.Runtime.InteropServices;
+using System.Runtime.CompilerServices;
 
-// using System;
-// using System.Runtime.InteropServices;
-// using System.Runtime.CompilerServices;
-// using ObjCRuntime;
-// using Foundation;
-// using PassKit;
+using Foundation;
+using ObjCRuntime;
+using PassKit;
 
-// #if !NET
-// using NativeHandle = System.IntPtr;
-// #endif
+namespace PassKit {
 
-// namespace PassKit {
+	/// <summary>The delegate that is called when <see cref="PKPayLaterView.ValidateAmount(System.Decimal,System.String,PassKit.PKPayLaterViewValidateAmountCallback)" /> has determined whether the Pay Later Merchandising information is valid.</summary>
+	/// <param name="eligible">True if the Pay Later Merchandising information is valid, false otherwise.</param>
+	public delegate void PKPayLaterViewValidateAmountCallback (bool eligible);
 
-// 	public partial class PKPayLaterView {
+	public partial class PKPayLaterView {
+		[UnmanagedCallersOnly]
+		static void TrampolineValidateAmount (IntPtr block, byte eligible)
+		{
+			var del = BlockLiteral.GetTarget<PKPayLaterViewValidateAmountCallback> (block);
+			if (del is not null) {
+				del (eligible != 0);
+			}
+		}
 
-// #if !NET
-// 		delegate void PKPayLaterValidateAmountCompletionHandler (IntPtr block, byte eligible);
-// 		static PKPayLaterValidateAmountCompletionHandler static_ValidateAmount = TrampolineValidateAmount;
+		/// <summary>Checks whether the Pay Later Merchandising information is valid for the specified amount and currency.</summary>
+		/// <param name="amount">The amount to check for.</param>
+		/// <param name="currencyCode">The ISO 4217 currency code to use.</param>
+		/// <param name="callback">The delegate that will be called with the result.</param>
+		[SupportedOSPlatform ("ios17.0")]
+		[UnsupportedOSPlatform ("maccatalyst")]
+		[UnsupportedOSPlatform ("macos")]
+		[UnsupportedOSPlatform ("tvos")]
+		[BindingImpl (BindingImplOptions.Optimizable)]
+		public static void ValidateAmount (NSDecimalNumber amount, string currencyCode, PKPayLaterViewValidateAmountCallback callback)
+		{
+			if (callback is null)
+				ObjCRuntime.ThrowHelper.ThrowArgumentNullException (nameof (callback));
 
-// 		[MonoPInvokeCallback (typeof (PKPayLaterValidateAmountCompletionHandler))]
-// #else
-// 		[UnmanagedCallersOnly]
-// #endif
-// 		static void TrampolineValidateAmount (IntPtr block, byte eligible)
-// 		{
-// 			var del = BlockLiteral.GetTarget<Action<bool>> (block);
-// 			if (del is not null) {
-// 				del (eligible != 0);
-// 			}
-// 		}
+			unsafe {
+				delegate* unmanaged<IntPtr, byte, void> trampoline = &TrampolineValidateAmount;
+				using var block = new BlockLiteral (trampoline, callback, typeof (PKPayLaterView), nameof (TrampolineValidateAmount));
+				var nsCurrencyCodePtr = NSString.CreateNative (currencyCode);
+				try {
+					PKPayLaterValidateAmount (amount.Handle, nsCurrencyCodePtr, &block);
+				} finally {
+					NSString.ReleaseNative (nsCurrencyCodePtr);
+				}
+			}
+		}
 
-// #if NET
-// 		[SupportedOSPlatform ("ios17.0")]
-// 		[UnsupportedOSPlatform ("maccatalyst")]
-// 		[UnsupportedOSPlatform ("macos")]
-// 		[UnsupportedOSPlatform ("tvos")]
-// #endif
-// 		[BindingImpl (BindingImplOptions.Optimizable)]
-// 		public static void ValidateAmount (NSDecimalNumber amount, string currencyCode, Action<bool> callback)
-// 		{
-// 			if (callback is null)
-// 				ObjCRuntime.ThrowHelper.ThrowArgumentNullException (nameof (callback));
+		/// <summary>Checks whether the Pay Later Merchandising information is valid for the specified amount and currency.</summary>
+		/// <param name="amount">The amount to check for.</param>
+		/// <param name="currencyCode">The ISO 4217 currency code to use.</param>
+		/// <param name="callback">The delegate that will be called with the result.</param>
+		[SupportedOSPlatform ("ios17.0")]
+		[UnsupportedOSPlatform ("maccatalyst")]
+		[UnsupportedOSPlatform ("macos")]
+		[UnsupportedOSPlatform ("tvos")]
+		[BindingImpl (BindingImplOptions.Optimizable)]
+		public static void ValidateAmount (decimal amount, string currencyCode, PKPayLaterViewValidateAmountCallback callback)
+		{
+			using var decimalAmount = new NSDecimalNumber ((NSDecimal) amount);
+			ValidateAmount (decimalAmount, currencyCode, callback);
+		}
 
-// 			unsafe {
-// #if NET
-// 				delegate* unmanaged<IntPtr, byte, void> trampoline = &TrampolineValidateAmount;
-// 				using var block = new BlockLiteral (trampoline, callback, typeof (PKPayLaterView), nameof (TrampolineValidateAmount));
-// #else
-// 				using var block = new BlockLiteral ();
-// 				block.SetupBlockUnsafe (static_ValidateAmount, callback);
-// #endif
-// 				var nsCurrencyCodePtr = NSString.CreateNative (currencyCode);
-// 				try {
-// 					PKPayLaterValidateAmount (amount.Handle, nsCurrencyCodePtr, &block);
-// 				} finally {
-// 					NSString.ReleaseNative (nsCurrencyCodePtr);
-// 				}
-// 			}
-// 		}
+		[SupportedOSPlatform ("ios17.0")]
+		[UnsupportedOSPlatform ("maccatalyst")]
+		[UnsupportedOSPlatform ("macos")]
+		[UnsupportedOSPlatform ("tvos")]
+		[DllImport (Constants.PassKitLibrary)]
+		unsafe static extern void PKPayLaterValidateAmount (IntPtr /* NSDecimalNumber */ amount, IntPtr /* NSString */  currencyCode, BlockLiteral* callback);
+	}
+}
 
-// 		[DllImport (Constants.PassKitLibrary)]
-// 		unsafe static extern void PKPayLaterValidateAmount (IntPtr /* NSDecimalNumber */ amount, IntPtr /* NSString */  currencyCode, BlockLiteral* callback);
-// 	}
-// }
-
-// #endif
+#endif
diff --git a/tests/monotouch-test/PassKit/PKPayLaterViewTest.cs b/tests/monotouch-test/PassKit/PKPayLaterViewTest.cs
index 54ab17be2f74..3dafe6dec6b0 100644
--- a/tests/monotouch-test/PassKit/PKPayLaterViewTest.cs
+++ b/tests/monotouch-test/PassKit/PKPayLaterViewTest.cs
@@ -1,31 +1,55 @@
-// Can be uncommented when this issue is resolved: # https://github.com/xamarin/xamarin-macios/issues/19271
+#if __IOS__ && !__MACCATALYST__
 
-// #if __IOS__ && !__MACCATALYST__
+using System;
+using System.Threading;
 
-// using System;
-// using Foundation;
-// using UIKit;
-// using PassKit;
-// using NUnit.Framework;
+using Foundation;
+using UIKit;
 
-// namespace MonoTouchFixtures.PassKit {
+using PassKit;
 
-// 	[TestFixture]
-// 	[Preserve (AllMembers = true)]
-// 	public class PKPayLaterViewTest {
+using NUnit.Framework;
 
-// 		[Test]
-// 		public void ValidateAmountTest ()
-// 		{
-// 			TestRuntime.AssertXcodeVersion (15, 0);
+namespace MonoTouchFixtures.PassKit {
 
-// 			for (int i = 0; i < 1000; i++){
-// 				PKPayLaterView.ValidateAmount (new NSDecimalNumber (i), "USD", (eligible) => {
-// 					Assert.False (eligible);
-// 				});
-// 			}
-// 		}
-// 	}
-// }
+	[TestFixture]
+	[Preserve (AllMembers = true)]
+	public class PKPayLaterViewTest {
 
-// #endif
+		[Test]
+		public void ValidateAmountTest_NSDecimal ()
+		{
+			TestRuntime.AssertXcodeVersion (15, 0);
+
+			var counter = 100;
+			var cnt = 0;
+			for (int i = 0; i < counter; i++) {
+				PKPayLaterView.ValidateAmount (new NSDecimalNumber (i), "USD", (eligible) => {
+					Interlocked.Increment (ref cnt);
+				});
+			}
+			// The callback is rarely called, so just assert that we don't get more callbacks than
+			// actual validation requests.
+			Assert.That (cnt, Is.Not.LessThan (0).And.Not.GreaterThan (counter), $"NSDecimalNumber overload");
+		}
+
+		[Test]
+		public void ValidateAmountTest_Decimal ()
+		{
+			TestRuntime.AssertXcodeVersion (15, 0);
+
+			var counter = 100;
+			var cnt = 0;
+			for (int i = 0; i < counter; i++) {
+				PKPayLaterView.ValidateAmount (i, "USD", (eligible) => {
+					Interlocked.Increment (ref cnt);
+				});
+			}
+			// The callback is rarely called, so just assert that we don't get more callbacks than
+			// actual validation requests.
+			Assert.That (cnt, Is.Not.LessThan (0).And.Not.GreaterThan (counter), $"decimal overload");
+		}
+	}
+}
+
+#endif
diff --git a/tests/xtro-sharpie/api-annotations-dotnet/iOS-PassKit.ignore b/tests/xtro-sharpie/api-annotations-dotnet/iOS-PassKit.ignore
index a4d141ea5e35..1be18a80705a 100644
--- a/tests/xtro-sharpie/api-annotations-dotnet/iOS-PassKit.ignore
+++ b/tests/xtro-sharpie/api-annotations-dotnet/iOS-PassKit.ignore
@@ -6,6 +6,3 @@
 
 # needed to allow our WeakDelegate wrap
 !extra-null-allowed! 'System.Void PassKit.PKPayLaterView::set_WeakDelegate(Foundation.NSObject)' has a extraneous [NullAllowed] on parameter #0
-
-# https://github.com/xamarin/xamarin-macios/issues/19271
-!missing-pinvoke! PKPayLaterValidateAmount is not bound