diff --git a/api/s5/http.go b/api/s5/http.go
index 4f02fe9..1f76856 100644
--- a/api/s5/http.go
+++ b/api/s5/http.go
@@ -7,6 +7,7 @@ import (
 	"encoding/base64"
 	"encoding/hex"
 	"errors"
+	"fmt"
 	"git.lumeweb.com/LumeWeb/libs5-go/encoding"
 	"git.lumeweb.com/LumeWeb/libs5-go/types"
 	"git.lumeweb.com/LumeWeb/portal/db/models"
@@ -303,6 +304,10 @@ func (h *HttpHandler) AccountRegister(jc jape.Context) {
 		return
 	}
 
+	if request.Email == "" {
+		request.Email = fmt.Sprintf("%s@%s", hex.EncodeToString(decodedKey[1:]), "example.com")
+	}
+
 	verify, _ := h.verifier.Verify(request.Email)
 
 	if !verify.Syntax.Valid {