diff --git a/src/StudentsController.ts b/src/StudentsController.ts
index f9b06da..90a107f 100644
--- a/src/StudentsController.ts
+++ b/src/StudentsController.ts
@@ -46,7 +46,7 @@ export class StudentsController {
         givenname: string;
         surname: string;
         pin?: string;
-        additionalConsents: { mustBeAccepted?: boolean; consent: string; link: string; linkDisplayText?: string }[];
+        additionalConsents: { mustBeAccepted?: boolean; consent: string; link?: string; linkDisplayText?: string }[];
     }): Promise<Student> {
         const identityInfo = await this.services.transportServices.account.getIdentityInfo();
 
@@ -110,7 +110,7 @@ export class StudentsController {
                     mustBeAccepted: consent.mustBeAccepted ?? false,
                     consent: consent.consent,
                     link: consent.link,
-                    linkDisplayText: consent.linkDisplayText
+                    linkDisplayText: consent.link !== undefined ? consent.linkDisplayText : undefined
                 }))
             });
         }
diff --git a/src/controllers/schemas.ts b/src/controllers/schemas.ts
index 57f30f0..0e2ce72 100644
--- a/src/controllers/schemas.ts
+++ b/src/controllers/schemas.ts
@@ -12,8 +12,8 @@ export const createStudentRequestSchema = z.object({
         .array(
             z.object({
                 mustBeAccepted: z.boolean().optional(),
-                consent: z.string().min(1).max(64),
-                link: z.string().url(),
+                consent: z.string().min(1).max(2000),
+                link: z.string().url().optional(),
                 linkDisplayText: z.string().min(1).max(64).optional()
             })
         )