diff --git a/src/authorization-response/PresentationExchange.ts b/src/authorization-response/PresentationExchange.ts
index 9636dae..671b82b 100644
--- a/src/authorization-response/PresentationExchange.ts
+++ b/src/authorization-response/PresentationExchange.ts
@@ -344,7 +344,12 @@ export class PresentationExchange {
         // So the behavior here is to bypass it if not present
         if (verifyPresentationCallback) {
           try {
-            await verifyPresentationCallback(vpw.original as W3CVerifiablePresentation, presentationSubmission);
+            const verificationResult = await verifyPresentationCallback(vpw.original as W3CVerifiablePresentation, presentationSubmission);
+            if (!verificationResult.verified) {
+              throw new Error(
+                SIOPErrors.VERIFIABLE_PRESENTATION_SIGNATURE_NOT_VALID + verificationResult.reason ? `. ${verificationResult.reason}` : ''
+              );
+            }
           } catch (error: unknown) {
             throw new Error(SIOPErrors.VERIFIABLE_PRESENTATION_SIGNATURE_NOT_VALID);
           }
diff --git a/src/authorization-response/types.ts b/src/authorization-response/types.ts
index 750edf5..3589558 100644
--- a/src/authorization-response/types.ts
+++ b/src/authorization-response/types.ts
@@ -87,11 +87,14 @@ export enum VPTokenLocation {
   TOKEN_RESPONSE = 'token_response',
 }
 
-export type PresentationVerificationResult = { verified: boolean };
+export type PresentationVerificationResult = { verified: boolean; reason?: string };
 
-export type PresentationVerificationCallback = (args: W3CVerifiablePresentation, presentationSubmissionn) => Promise<PresentationVerificationResult>;
+export type PresentationVerificationCallback = (
+  args: W3CVerifiablePresentation | CompactSdJwtVc,
+  presentationSubmission: PresentationSubmission
+) => Promise<PresentationVerificationResult>;
 
-export type PresentationSignCallback = (args: PresentationSignCallBackParams) => Promise<W3CVerifiablePresentation>;
+export type PresentationSignCallback = (args: PresentationSignCallBackParams) => Promise<W3CVerifiablePresentation | CompactSdJwtVc>;
 
 export interface VerifyAuthorizationResponseOpts {
   correlationId: string;