25% Off✦ Verified
25% off
25% Off Boss Golf Clothing at Function 18
90% chance
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Save at Function 18 with verified coupon codes, promo codes and exclusive offers.
6
Codes
4
Verified
25% Off
Best Deal
Updated Aug 15, 2026 · 4 verified
Best code right now
25% off
Daily average across every live code, tracked automatically — not a one-time snapshot.
67%
4/6 strong
Verified — confirmed working
25% off
25% Off Boss Golf Clothing at Function 18
10% off
10% Off Select Items at Function 18
10% off
10% Off Clearance Items at Function 18
More codes — may have expired
10% off
10% Off Storewide at Function 18
10% off
10% Off Select Items at Function 18
TrulyThrift currently tracks 6 Function 18 coupon codes, of which 4 are verified working. The best available discount right now is 25% Off. Page last verified Aug 15, 2026.
Save at Function 18 with verified coupon codes, promo codes and exclusive offers.
Visit Function 18 ↗| Offer | Discount | Type | Status |
|---|---|---|---|
| 25% off | 25% Off | Percent | Verified |
| 25% off | 25% Off | Percent | Verified |
| 10% off | 10% Off | Percent | Verified |
| 10% off | 10% Off | Percent | Verified |
| 10% off | 10% Off | Percent | Unverified |
| 10% off | 10% Off | Percent | Unverified |
Truly Thrift verifies Function 18 codes through a three-layer system: automated checkout testing, cross-source corroboration, and real shopper reports. Verified codes show a green badge; other codes show their recent chance of working. Code health is a per-code reliability score built from that evidence — right now the 6 codes listed for Function 18 carry an average code health of 67%. Read our full verification process for details across every store.
Direct checkout testing currently covers Shopify storefronts, with more platforms rolling out over time. Until Function 18 is covered, Layers 2 and 3 below carry more of the weight for this store's codes.
For codes we can't test directly, we check whether independent coupon listings still show the same code as active. If independent sources agree a code is gone, we downgrade or hide it — even before a shopper reports back.
Every "Worked" / "Failed" button on this page feeds straight into these codes' scores. No shopper reports have come in for Function 18 this week yet — yours would be the first.