diff --git a/go-backend/internal/validation/membership_validation.go b/go-backend/internal/validation/membership_validation.go
index 35ded4e..4666d2a 100644
--- a/go-backend/internal/validation/membership_validation.go
+++ b/go-backend/internal/validation/membership_validation.go
@@ -2,39 +2,37 @@ package validation
 
 import (
 	"GoMembership/internal/models"
-	"GoMembership/internal/repositories"
 	"GoMembership/pkg/errors"
 	"GoMembership/pkg/logger"
 
 	"github.com/go-playground/validator/v10"
+	"gorm.io/gorm"
 )
 
-func validateMembership(sl validator.StructLevel) {
-	membership := sl.Current().Interface().(models.User).Membership
-	if membership.SubscriptionModel.RequiredMembershipField != "" {
-		switch membership.SubscriptionModel.RequiredMembershipField {
+func validateMembership(db *gorm.DB, user *models.User, sl validator.StructLevel) {
+	if user.Membership.SubscriptionModel.RequiredMembershipField != "" {
+		switch user.Membership.SubscriptionModel.RequiredMembershipField {
 		case "ParentMembershipID":
-			if err := CheckParentMembershipID(membership); err != nil {
+			if err := CheckParentMembershipID(db, user); err != nil {
 				logger.Error.Printf("Error ParentMembershipValidation: %v", err.Error())
-				sl.ReportError(membership.ParentMembershipID, membership.SubscriptionModel.RequiredMembershipField,
+				sl.ReportError(user.Membership.ParentMembershipID, user.Membership.SubscriptionModel.RequiredMembershipField,
 					"RequiredMembershipField", "invalid", "")
 			}
 		default:
 			logger.Error.Printf("Error no matching RequiredMembershipField: %v", errors.ErrInvalidValue.Error())
-			sl.ReportError(membership.ParentMembershipID, membership.SubscriptionModel.RequiredMembershipField,
+			sl.ReportError(user.Membership.ParentMembershipID, user.Membership.SubscriptionModel.RequiredMembershipField,
 				"RequiredMembershipField", "not_implemented", "")
 		}
-
 	}
 }
 
-func CheckParentMembershipID(membership models.Membership) error {
+func CheckParentMembershipID(db *gorm.DB, user *models.User) error {
 
-	if membership.ParentMembershipID == 0 {
+	if user.Membership.ParentMembershipID == 0 {
 		return errors.ValErrParentIDNotSet
 	} else {
-		_, err := repositories.GetUserByID(&membership.ParentMembershipID)
-		if err != nil {
+		var parent models.User
+		if err := parent.FromID(db, &user.Membership.ParentMembershipID); err != nil {
 			return errors.ValErrParentIDNotFound
 		}
 	}
diff --git a/go-backend/internal/validation/setup.go b/go-backend/internal/validation/setup.go
index bd9dddd..0ae7ec5 100644
--- a/go-backend/internal/validation/setup.go
+++ b/go-backend/internal/validation/setup.go
@@ -4,17 +4,18 @@ import (
 	"GoMembership/internal/models"
 
 	"github.com/gin-gonic/gin/binding"
+	"gorm.io/gorm"
 
 	"github.com/go-playground/validator/v10"
 )
 
-func SetupValidators() {
+func SetupValidators(db *gorm.DB) {
 	if v, ok := binding.Validator.Engine().(*validator.Validate); ok {
 		// Register custom validators
 		v.RegisterValidation("safe_content", ValidateSafeContent)
 
 		// Register struct-level validations
-		v.RegisterStructValidation(ValidateUser, models.User{})
+		v.RegisterStructValidation(ValidateUserFactory(db), models.User{})
 		v.RegisterStructValidation(ValidateSubscription, models.SubscriptionModel{})
 	}
 }
diff --git a/go-backend/internal/validation/user_validation.go b/go-backend/internal/validation/user_validation.go
index 7ef2665..0291dd0 100644
--- a/go-backend/internal/validation/user_validation.go
+++ b/go-backend/internal/validation/user_validation.go
@@ -1,7 +1,6 @@
 package validation
 
 import (
-	"GoMembership/internal/constants"
 	"GoMembership/internal/models"
 	"GoMembership/internal/repositories"
 	"GoMembership/pkg/logger"
@@ -10,6 +9,7 @@ import (
 
 	"github.com/go-playground/validator/v10"
 	passwordvalidator "github.com/wagslane/go-password-validator"
+	"gorm.io/gorm"
 )
 
 var passwordErrorTranslations = map[string]string{
@@ -21,11 +21,15 @@ var passwordErrorTranslations = map[string]string{
 	"using numbers":                     "server.validation.numbers",
 }
 
-func ValidateUser(sl validator.StructLevel) {
+func ValidateUserFactory(db *gorm.DB) validator.StructLevelFunc {
+	return func(sl validator.StructLevel) {
+		validateUser(db, sl)
+	}
+}
+
+func validateUser(db *gorm.DB, sl validator.StructLevel) {
 	user := sl.Current().Interface().(models.User)
 
-	isSuper := user.RoleID >= constants.Roles.Admin
-	isSupporter := user.RoleID == constants.Roles.Supporter
 	// validate subscriptionModel
 	if user.Membership.SubscriptionModel.Name == "" {
 		sl.ReportError(user.Membership.SubscriptionModel.Name, "subscription.name", "name", "required", "")
@@ -38,7 +42,7 @@ func ValidateUser(sl validator.StructLevel) {
 			user.Membership.SubscriptionModel = *selectedModel
 		}
 	}
-	if isSupporter {
+	if user.IsSupporter() {
 		if user.BankAccount.IBAN != "" {
 			validateBankAccount(sl)
 		}
@@ -54,9 +58,9 @@ func ValidateUser(sl validator.StructLevel) {
 	if user.DateOfBirth.After(time.Now().AddDate(-18, 0, 0)) {
 		sl.ReportError(user.DateOfBirth, "user.user", "user.dateofbirth", "age", "")
 	}
-	validateMembership(sl)
+	validateMembership(db, &user, sl)
 
-	if isSuper {
+	if user.IsAdmin() {
 		return
 	}