diff --git a/csaf/util.go b/csaf/util.go
index 385bfd30..f8e34be6 100644
--- a/csaf/util.go
+++ b/csaf/util.go
@@ -37,21 +37,31 @@ func ExtractProviderURL(r io.Reader, all bool) ([]string, error) {
 	return urls, nil
 }
 
-// FindProductIdentificationHelpers finds all ProductIdentificationHelper for a given ProductID
-// by iterating over all full product names and branches recursively available in the ProductTree.
-func (pt *ProductTree) FindProductIdentificationHelpers(id ProductID) []*ProductIdentificationHelper {
-	var result []*ProductIdentificationHelper
-	add := func(h *ProductIdentificationHelper) {
-		if h != nil {
-			result = append(result, h)
-		}
-	}
+// CollectProductIdentificationHelpers returns a slice of all ProductIdentificationHelper
+// for a given ProductID.
+func (pt *ProductTree) CollectProductIdentificationHelpers(id ProductID) []*ProductIdentificationHelper {
+	var helpers []*ProductIdentificationHelper
+	pt.FindProductIdentificationHelpers(
+		id, func(helper *ProductIdentificationHelper) {
+			helpers = append(helpers, helper)
+		})
+	return helpers
+}
 
+// FindProductIdentificationHelpers calls visit on all ProductIdentificationHelper
+// for a given ProductID by iterating over all full product names and branches
+// recursively available in the ProductTree.
+func (pt *ProductTree) FindProductIdentificationHelpers(
+	id ProductID,
+	visit func(*ProductIdentificationHelper),
+) {
 	// Iterate over all full product names
 	if fpns := pt.FullProductNames; fpns != nil {
 		for _, fpn := range *fpns {
-			if fpn != nil && fpn.ProductID != nil && *fpn.ProductID == id {
-				add(fpn.ProductIdentificationHelper)
+			if fpn != nil &&
+				fpn.ProductID != nil && *fpn.ProductID == id &&
+				fpn.ProductIdentificationHelper != nil {
+				visit(fpn.ProductIdentificationHelper)
 			}
 		}
 	}
@@ -59,8 +69,13 @@ func (pt *ProductTree) FindProductIdentificationHelpers(id ProductID) []*Product
 	// Iterate over branches recursively
 	var recBranch func(b *Branch)
 	recBranch = func(b *Branch) {
-		if fpn := b.Product; fpn != nil && fpn.ProductID != nil && *fpn.ProductID == id {
-			add(fpn.ProductIdentificationHelper)
+		if b == nil {
+			return
+		}
+		if fpn := b.Product; fpn != nil &&
+			fpn.ProductID != nil && *fpn.ProductID == id &&
+			fpn.ProductIdentificationHelper != nil {
+			visit(fpn.ProductIdentificationHelper)
 		}
 		for _, c := range b.Branches {
 			recBranch(c)
@@ -74,12 +89,11 @@ func (pt *ProductTree) FindProductIdentificationHelpers(id ProductID) []*Product
 	if rels := pt.RelationShips; rels != nil {
 		for _, rel := range *rels {
 			if rel != nil {
-				if fpn := rel.FullProductName; fpn != nil && fpn.ProductID != nil && *fpn.ProductID == id {
-					add(fpn.ProductIdentificationHelper)
+				if fpn := rel.FullProductName; fpn != nil && fpn.ProductID != nil &&
+					*fpn.ProductID == id && fpn.ProductIdentificationHelper != nil {
+					visit(fpn.ProductIdentificationHelper)
 				}
 			}
 		}
 	}
-
-	return result
 }
diff --git a/csaf/util_test.go b/csaf/util_test.go
index 5470910c..0d5ff496 100644
--- a/csaf/util_test.go
+++ b/csaf/util_test.go
@@ -173,8 +173,9 @@ func TestProductTree_FindProductIdentificationHelpers(t *testing.T) {
 				FullProductNames: test.fields.FullProductNames,
 				RelationShips:    test.fields.RelationShips,
 			}
-			if got := pt.FindProductIdentificationHelpers(test.args.id); !reflect.DeepEqual(got, test.want) {
-				tt.Errorf("ProductTree.FindProductIdentificationHelpers() = %v, want %v", got, test.want)
+			if got := pt.CollectProductIdentificationHelpers(test.args.id); !reflect.DeepEqual(got, test.want) {
+				tt.Errorf("ProductTree.FindProductIdentificationHelpers() = %v, want %v",
+					got, test.want)
 			}
 		})
 	}
diff --git a/examples/purls_searcher/main.go b/examples/purls_searcher/main.go
index c1fec9a9..c1ec3e19 100644
--- a/examples/purls_searcher/main.go
+++ b/examples/purls_searcher/main.go
@@ -10,6 +10,7 @@ import (
 	"strings"
 
 	"github.com/csaf-poc/csaf_distribution/v3/csaf"
+	"github.com/csaf-poc/csaf_distribution/v3/util"
 )
 
 func main() {
@@ -40,11 +41,17 @@ func run(files []string, ids string) error {
 		}
 
 		for _, id := range strings.Split(ids, ",") {
-			for i, h := range adv.ProductTree.FindProductIdentificationHelpers(csaf.ProductID(id)) {
-				if h.PURL != nil {
-					fmt.Printf("%d. %s\n", i, *h.PURL)
-				}
-			}
+			already := util.Set[csaf.PURL]{}
+			i := 0
+			adv.ProductTree.FindProductIdentificationHelpers(
+				csaf.ProductID(id),
+				func(h *csaf.ProductIdentificationHelper) {
+					if h.PURL != nil && !already.Contains(*h.PURL) {
+						already.Add(*h.PURL)
+						i++
+						fmt.Printf("%d. %s\n", i, *h.PURL)
+					}
+				})
 		}
 	}