diff --git a/apps/api/src/trust-portal/cert-badge-mapper.spec.ts b/apps/api/src/trust-portal/cert-badge-mapper.spec.ts
new file mode 100644
index 0000000000..32aee3eb1e
--- /dev/null
+++ b/apps/api/src/trust-portal/cert-badge-mapper.spec.ts
@@ -0,0 +1,102 @@
+import {
+  extractComplianceBadges,
+  mapCertificationToBadgeType,
+} from './cert-badge-mapper';
+
+describe('mapCertificationToBadgeType', () => {
+  // CS-688: the "IEC" infix and ":2022" suffix must not stop ISO 27001 from
+  // being recognized.
+  it('maps "ISO/IEC 27001:2022" to iso27001', () => {
+    expect(mapCertificationToBadgeType('ISO/IEC 27001:2022')).toBe('iso27001');
+  });
+
+  it('maps common certifications to their canonical badge types', () => {
+    expect(mapCertificationToBadgeType('SOC 2 Type II')).toBe('soc2');
+    expect(mapCertificationToBadgeType('ISO 9001:2015')).toBe('iso9001');
+    expect(mapCertificationToBadgeType('ISO/IEC 42001:2023')).toBe('iso42001');
+    expect(mapCertificationToBadgeType('GDPR Compliance')).toBe('gdpr');
+    expect(mapCertificationToBadgeType('HIPAA')).toBe('hipaa');
+    expect(mapCertificationToBadgeType('PCI DSS')).toBe('pci_dss');
+    expect(mapCertificationToBadgeType('NEN 7510')).toBe('nen7510');
+  });
+
+  // The fully spelled-out PCI name must map too — the scan-time mappers already
+  // recognize it, so the shared display mapper must not drop it.
+  it('maps the spelled-out "Payment Card Industry Data Security Standard"', () => {
+    expect(
+      mapCertificationToBadgeType('Payment Card Industry Data Security Standard'),
+    ).toBe('pci_dss');
+  });
+
+  // Regression: soc3 / pipeda / ccpa were supported by the public portal's
+  // original mapper. Consolidation must not drop them or affected vendors lose
+  // their public Trust Centre badges.
+  it('maps soc3 / pipeda / ccpa (restored after consolidation)', () => {
+    expect(mapCertificationToBadgeType('SOC 3')).toBe('soc3');
+    expect(mapCertificationToBadgeType('PIPEDA')).toBe('pipeda');
+    expect(mapCertificationToBadgeType('CCPA')).toBe('ccpa');
+  });
+
+  // The digits alone must not classify an unrelated identifier.
+  it('does not misclassify ids that merely contain the standard digits', () => {
+    expect(mapCertificationToBadgeType('Catalog 19001')).toBeNull();
+    expect(mapCertificationToBadgeType('ISO 90010')).toBeNull();
+  });
+
+  // Distinct 2701x standards must not earn the 27001 badge.
+  it('does not read ISO/IEC 27017 or 27018 as iso27001', () => {
+    expect(mapCertificationToBadgeType('ISO/IEC 27017:2015')).toBeNull();
+    expect(mapCertificationToBadgeType('ISO/IEC 27018:2019')).toBeNull();
+  });
+
+  it('returns null for certifications with no badge', () => {
+    expect(mapCertificationToBadgeType('HDS')).toBeNull();
+    expect(mapCertificationToBadgeType('')).toBeNull();
+  });
+});
+
+describe('extractComplianceBadges', () => {
+  // CS-688 regression: Scaleway's verified certs must yield iso27001 + gdpr.
+  it('extracts verified badges and skips unrecognized certs', () => {
+    const badges = extractComplianceBadges({
+      certifications: [
+        { type: 'ISO/IEC 27001:2022', status: 'verified' },
+        { type: 'HDS', status: 'verified' },
+        { type: 'GDPR Compliance', status: 'verified' },
+      ],
+    });
+
+    const types = badges.map((b) => b.type);
+    expect(types).toContain('iso27001');
+    expect(types).toContain('gdpr');
+    expect(types).not.toContain('HDS');
+  });
+
+  it('ignores certifications that are not verified', () => {
+    const badges = extractComplianceBadges({
+      certifications: [
+        { type: 'ISO/IEC 27001:2022', status: 'expired' },
+        { type: 'GDPR Compliance', status: 'verified' },
+      ],
+    });
+
+    expect(badges.map((b) => b.type)).toEqual(['gdpr']);
+  });
+
+  it('de-duplicates repeated badge types', () => {
+    const badges = extractComplianceBadges({
+      certifications: [
+        { type: 'ISO/IEC 27001:2022', status: 'verified' },
+        { type: 'ISO 27001:2013', status: 'verified' },
+      ],
+    });
+
+    expect(badges).toEqual([{ type: 'iso27001', verified: true }]);
+  });
+
+  it('returns an empty array for missing or malformed data', () => {
+    expect(extractComplianceBadges(null)).toEqual([]);
+    expect(extractComplianceBadges({})).toEqual([]);
+    expect(extractComplianceBadges({ certifications: 'nope' })).toEqual([]);
+  });
+});
diff --git a/apps/api/src/trust-portal/cert-badge-mapper.ts b/apps/api/src/trust-portal/cert-badge-mapper.ts
new file mode 100644
index 0000000000..cbe6253826
--- /dev/null
+++ b/apps/api/src/trust-portal/cert-badge-mapper.ts
@@ -0,0 +1,101 @@
+/**
+ * Single source of truth for turning AI-extracted certification names
+ * (`GlobalVendors.riskAssessmentData.certifications[].type`) into Trust Portal
+ * compliance badge types.
+ *
+ * Both the admin vendor sync (`trust-portal.service.ts`) and the public,
+ * visitor-facing portal (`trust-access.service.ts`) derive badges through this
+ * module so the two surfaces can never disagree — the mismatch that caused
+ * CS-688 (Scaleway showed ISO 27001 in the admin Vendors tab but only GDPR on
+ * the public Trust Centre).
+ */
+
+export type ComplianceBadge = {
+  type: string;
+  verified: boolean;
+};
+
+/**
+ * Whether a normalized cert string (lowercased, alphanumerics only) names the
+ * given ISO standard number.
+ *
+ * - Requires an "iso" / "iso iec" prefix, so unrelated ids that merely contain
+ *   the digits ("19001", "127001") are not misclassified.
+ * - The optional "iec" handles joint ISO/IEC standards whose "IEC" infix would
+ *   otherwise break the match ("ISO/IEC 27001:2022" -> "isoiec270012022").
+ * - Allows an optional trailing 4-digit year ("ISO 9001:2015" -> "iso90012015")
+ *   but forbids any other trailing digit, so a longer number is not read as a
+ *   shorter standard ("ISO 90010" is not "ISO 9001", "ISO 27017" is not 27001).
+ *
+ * `standardNumber` is always a hard-coded digit literal — never user input —
+ * so building the RegExp from it carries no injection risk.
+ */
+function matchesIsoStandard(normalized: string, standardNumber: string): boolean {
+  return new RegExp(`iso(?:iec)?${standardNumber}(?:\\d{4})?(?!\\d)`).test(
+    normalized,
+  );
+}
+
+/**
+ * Map a single certification name to its canonical badge type, or `null` when
+ * the certification is not one we render a badge for.
+ */
+export function mapCertificationToBadgeType(certType: string): string | null {
+  // Strip every non-alphanumeric char (spaces, slashes, colons, underscores)
+  // so separator variants collapse to one form — "PCI DSS", "PCI-DSS" and
+  // "pci_dss" all become "pcidss". Matches below therefore never need to spell
+  // out separator variants.
+  const normalized = certType.toLowerCase().replace(/[^a-z0-9]/g, '');
+
+  if (normalized.includes('soc2')) return 'soc2';
+  if (normalized.includes('soc3')) return 'soc3';
+  if (matchesIsoStandard(normalized, '27001')) return 'iso27001';
+  if (matchesIsoStandard(normalized, '42001')) return 'iso42001';
+  if (normalized.includes('gdpr')) return 'gdpr';
+  if (normalized.includes('hipaa')) return 'hipaa';
+  // "pcidss" covers "PCI DSS"; "paymentcard" covers the fully spelled-out
+  // "Payment Card Industry Data Security Standard" (kept in sync with the
+  // scan-time mappers in trigger/vendor/vendor-risk-assessment*).
+  if (normalized.includes('pcidss') || normalized.includes('paymentcard'))
+    return 'pci_dss';
+  if (normalized.includes('nen7510')) return 'nen7510';
+  if (matchesIsoStandard(normalized, '9001')) return 'iso9001';
+  // soc3 / pipeda / ccpa were supported by the public portal's original mapper
+  // before consolidation; keep them so those vendors don't lose their public
+  // Trust Centre badges. The public portal renders them via label text and the
+  // admin UI safely skips badge types it has no icon for.
+  if (normalized.includes('pipeda')) return 'pipeda';
+  if (normalized.includes('ccpa')) return 'ccpa';
+
+  return null;
+}
+
+/**
+ * Extract the deduplicated set of verified compliance badges from a
+ * `GlobalVendors.riskAssessmentData` object. Unrecognized certifications are
+ * skipped. Returns an empty array when there is nothing to map.
+ */
+export function extractComplianceBadges(data: unknown): ComplianceBadge[] {
+  if (!data || typeof data !== 'object') return [];
+
+  const certifications = (data as { certifications?: unknown }).certifications;
+  if (!Array.isArray(certifications)) return [];
+
+  const badges: ComplianceBadge[] = [];
+  const seenTypes = new Set<string>();
+
+  for (const cert of certifications) {
+    if (!cert || typeof cert !== 'object') continue;
+
+    const { type, status } = cert as { type?: unknown; status?: unknown };
+    if (status !== 'verified' || typeof type !== 'string') continue;
+
+    const badgeType = mapCertificationToBadgeType(type);
+    if (badgeType && !seenTypes.has(badgeType)) {
+      seenTypes.add(badgeType);
+      badges.push({ type: badgeType, verified: true });
+    }
+  }
+
+  return badges;
+}
diff --git a/apps/api/src/trust-portal/trust-access.service.spec.ts b/apps/api/src/trust-portal/trust-access.service.spec.ts
index e0bb9604ca..0a812b821d 100644
--- a/apps/api/src/trust-portal/trust-access.service.spec.ts
+++ b/apps/api/src/trust-portal/trust-access.service.spec.ts
@@ -24,6 +24,12 @@ jest.mock('@db', () => ({
     member: {
       findFirst: jest.fn(),
     },
+    vendor: {
+      findMany: jest.fn(),
+    },
+    globalVendors: {
+      findMany: jest.fn(),
+    },
     $transaction: jest.fn(),
   },
   Prisma: {
@@ -74,6 +80,12 @@ const mockDb = db as unknown as {
   member: {
     findFirst: jest.Mock;
   };
+  vendor: {
+    findMany: jest.Mock;
+  };
+  globalVendors: {
+    findMany: jest.Mock;
+  };
   $transaction: jest.Mock;
 };
 
@@ -81,6 +93,77 @@ const mockGetSignedUrl = getSignedUrl as jest.MockedFunction<
   typeof getSignedUrl
 >;
 
+describe('TrustAccessService getPublicVendors compliance badges (CS-688)', () => {
+  const service = new TrustAccessService(
+    {
+      getSignedUrl: jest.fn(),
+    } as any,
+    {} as any,
+    {} as any,
+    {} as any,
+    {} as any,
+  );
+
+  beforeEach(() => {
+    jest.clearAllMocks();
+    mockDb.trust.findUnique.mockResolvedValue({ organizationId: 'org_1' });
+  });
+
+  // Regression: the public Trust Centre served a stale stored badge set
+  // (GDPR only) for Scaleway while the vendor's verified certifications include
+  // ISO 27001. The public path must derive badges from the certification data,
+  // not trust the stale stored value.
+  it('derives ISO 27001 from cert data even when stored badges are stale (GDPR only)', async () => {
+    mockDb.vendor.findMany.mockResolvedValue([
+      {
+        id: 'vnd_scaleway',
+        name: 'Scaleway',
+        description: null,
+        website: 'scaleway.com',
+        logoUrl: null,
+        complianceBadges: [{ type: 'gdpr', verified: true }],
+      },
+    ]);
+    mockDb.globalVendors.findMany.mockResolvedValue([
+      {
+        website: 'scaleway.com',
+        riskAssessmentData: {
+          certifications: [
+            { type: 'ISO/IEC 27001:2022', status: 'verified' },
+            { type: 'HDS', status: 'verified' },
+            { type: 'GDPR Compliance', status: 'verified' },
+          ],
+        },
+      },
+    ]);
+
+    const result = await service.getPublicVendors('capawesome');
+    const types = result[0].complianceBadges.map((b) => b.type);
+
+    expect(types).toContain('iso27001');
+    expect(types).toContain('gdpr');
+  });
+
+  it('keeps the stored badges when there is no derivable cert data', async () => {
+    mockDb.vendor.findMany.mockResolvedValue([
+      {
+        id: 'vnd_x',
+        name: 'X',
+        description: null,
+        website: 'x.com',
+        logoUrl: null,
+        complianceBadges: [{ type: 'soc2', verified: true }],
+      },
+    ]);
+    mockDb.globalVendors.findMany.mockResolvedValue([]);
+
+    const result = await service.getPublicVendors('capawesome');
+    const types = result[0].complianceBadges.map((b) => b.type);
+
+    expect(types).toEqual(['soc2']);
+  });
+});
+
 describe('TrustAccessService favicon branding', () => {
   const service = new TrustAccessService(
     {
diff --git a/apps/api/src/trust-portal/trust-access.service.ts b/apps/api/src/trust-portal/trust-access.service.ts
index 0ada81b0eb..939c43189d 100644
--- a/apps/api/src/trust-portal/trust-access.service.ts
+++ b/apps/api/src/trust-portal/trust-access.service.ts
@@ -6,6 +6,7 @@ import {
 } from '@nestjs/common';
 import { db } from '@db';
 import { randomBytes } from 'crypto';
+import { extractComplianceBadges } from './cert-badge-mapper';
 import {
   ApproveAccessRequestDto,
   CreateAccessRequestDto,
@@ -2876,9 +2877,14 @@ export class TrustAccessService {
             }
           }
 
-          // Extract compliance badges from riskAssessmentData when vendor record has none
-          if (!badges || !Array.isArray(badges) || badges.length === 0) {
-            badges = this.extractBadgesFromRiskData(parsed);
+          // Prefer badges freshly derived from the vendor's verified
+          // certifications so the public Trust Centre always matches the admin
+          // Vendors tab, rather than trusting a possibly-stale stored
+          // complianceBadges value (CS-688). Fall back to the stored value only
+          // when there is nothing to derive.
+          const derivedBadges = extractComplianceBadges(parsed);
+          if (derivedBadges.length > 0) {
+            badges = derivedBadges;
           }
         }
       }
@@ -2890,63 +2896,6 @@ export class TrustAccessService {
     });
   }
 
-  /**
-   * Extract compliance badges from GlobalVendors riskAssessmentData certifications.
-   * Used as fallback when the vendor record has no complianceBadges synced yet.
-   */
-  private extractBadgesFromRiskData(
-    data: Record<string, unknown>,
-  ): Array<{ type: string; verified: boolean }> | null {
-    const certs = data.certifications;
-    if (!Array.isArray(certs)) return null;
-
-    const CERT_MAP: Record<string, string> = {
-      soc2: 'soc2',
-      'soc 2': 'soc2',
-      soc3: 'soc3',
-      'soc 3': 'soc3',
-      iso27001: 'iso27001',
-      'iso 27001': 'iso27001',
-      iso42001: 'iso42001',
-      'iso 42001': 'iso42001',
-      gdpr: 'gdpr',
-      hipaa: 'hipaa',
-      pcidss: 'pci_dss',
-      'pci dss': 'pci_dss',
-      pci_dss: 'pci_dss',
-      nen7510: 'nen7510',
-      'nen 7510': 'nen7510',
-      iso9001: 'iso9001',
-      'iso 9001': 'iso9001',
-      pipeda: 'pipeda',
-      ccpa: 'ccpa',
-    };
-
-    const badges: Array<{ type: string; verified: boolean }> = [];
-    const seen = new Set<string>();
-
-    for (const cert of certs) {
-      if (
-        !cert ||
-        typeof cert !== 'object' ||
-        cert.status !== 'verified' ||
-        typeof cert.type !== 'string'
-      )
-        continue;
-
-      const normalized = cert.type.toLowerCase().replace(/[^a-z0-9 _]/g, '');
-      // Use canonical slug for known certs, keep original type for unknown ones
-      const badgeType = CERT_MAP[normalized] ?? cert.type.trim();
-      const key = badgeType.toLowerCase();
-      if (badgeType && !seen.has(key)) {
-        seen.add(key);
-        badges.push({ type: badgeType, verified: true });
-      }
-    }
-
-    return badges.length > 0 ? badges : null;
-  }
-
   /**
    * Format compliance badges as simple type + label pairs for external rendering.
    * Does NOT include branded icons to avoid implying vendors were certified through us.
diff --git a/apps/api/src/trust-portal/trust-portal.service.ts b/apps/api/src/trust-portal/trust-portal.service.ts
index 4ef2b358c5..eee766319a 100644
--- a/apps/api/src/trust-portal/trust-portal.service.ts
+++ b/apps/api/src/trust-portal/trust-portal.service.ts
@@ -12,6 +12,7 @@ import {
   PutObjectCommand,
 } from '@aws-sdk/client-s3';
 import { db } from '@db';
+import { extractComplianceBadges } from './cert-badge-mapper';
 import {
   DomainStatusResponseDto,
   DomainVerificationDto,
@@ -1875,10 +1876,10 @@ export class TrustPortalService {
           });
 
           if (globalVendor?.riskAssessmentData) {
-            const extractedBadges = this.extractComplianceBadges(
+            const extractedBadges = extractComplianceBadges(
               globalVendor.riskAssessmentData,
             );
-            if (extractedBadges && extractedBadges.length > 0) {
+            if (extractedBadges.length > 0) {
               const currentBadges = vendor.complianceBadges as Array<{
                 type: string;
               }> | null;
@@ -1934,83 +1935,6 @@ export class TrustPortalService {
     }));
   }
 
-  private extractComplianceBadges(
-    data: Prisma.JsonValue,
-  ): Array<{ type: string; verified: boolean }> | null {
-    try {
-      const parsed = data as {
-        certifications?: Array<{ type: string; status: string }>;
-      };
-
-      if (!parsed?.certifications || !Array.isArray(parsed.certifications)) {
-        return null;
-      }
-
-      const badges: Array<{ type: string; verified: boolean }> = [];
-      const seenTypes = new Set<string>();
-
-      for (const cert of parsed.certifications) {
-        if (cert.status !== 'verified') continue;
-
-        const badgeType = this.mapCertificationToBadgeType(cert.type);
-        if (badgeType && !seenTypes.has(badgeType)) {
-          seenTypes.add(badgeType);
-          badges.push({ type: badgeType, verified: true });
-        }
-      }
-
-      return badges.length > 0 ? badges : null;
-    } catch {
-      return null;
-    }
-  }
-
-  private mapCertificationToBadgeType(certType: string): string | null {
-    const normalized = certType.toLowerCase().replace(/[^a-z0-9]/g, '');
-
-    if (normalized.includes('soc2') || normalized.includes('soc 2'))
-      return 'soc2';
-    if (this.matchesIsoStandard(normalized, '27001')) return 'iso27001';
-    if (this.matchesIsoStandard(normalized, '42001')) return 'iso42001';
-    if (normalized.includes('gdpr')) return 'gdpr';
-    if (normalized.includes('hipaa')) return 'hipaa';
-    if (
-      normalized.includes('pcidss') ||
-      normalized.includes('pci dss') ||
-      normalized.includes('pci_dss')
-    )
-      return 'pci_dss';
-    if (normalized.includes('nen7510') || normalized.includes('nen 7510'))
-      return 'nen7510';
-    if (this.matchesIsoStandard(normalized, '9001')) return 'iso9001';
-
-    return null;
-  }
-
-  /**
-   * Whether a normalized cert string (lowercased, alphanumerics only) names the
-   * given ISO standard number.
-   *
-   * - Requires an "iso" / "iso iec" prefix, so unrelated ids that merely contain
-   *   the digits ("19001", "127001") are not misclassified.
-   * - The optional "iec" handles joint ISO/IEC standards whose "IEC" infix would
-   *   otherwise break the match ("ISO/IEC 27001:2022" -> "isoiec270012022").
-   * - Allows an optional trailing 4-digit year ("ISO 9001:2015" -> "iso90012015")
-   *   but forbids any other trailing digit, so a longer number is not read as a
-   *   shorter standard ("ISO 90010" is not "ISO 9001", "ISO 27017" is not 27001).
-   *
-   * `standardNumber` is always a hard-coded digit literal — never user input —
-   * so building the RegExp from it carries no injection risk.
-   */
-  private matchesIsoStandard(
-    normalized: string,
-    standardNumber: string,
-  ): boolean {
-    return new RegExp(`iso(?:iec)?${standardNumber}(?:\\d{4})?(?!\\d)`).test(
-      normalized,
-    );
-  }
-
   private generateLogoUrl(website: string | null): string | null {
     if (!website) return null;
     try {