diff --git a/lib/anonymous.js b/lib/anonymous.js
index 16d95543..663a1c37 100644
--- a/lib/anonymous.js
+++ b/lib/anonymous.js
@@ -43,12 +43,16 @@ export const useAnonymous = (fn, options = defaultOptions) => {
   const invoice = data?.createInvoice
   useEffect(() => {
     if (invoice) {
+      // fix for bug where `showModal` runs the code for two modals and thus executes `onSuccess` twice
+      let called = false
       showModal(onClose =>
         <Invoice
           id={invoice.id}
           onConfirmation={
             async ({ satsReceived }) => {
               setTimeout(async () => {
+                if (called) return
+                called = true
                 await fn(satsReceived, ...fnArgs, invoice.hash)
                 onClose()
               }, 2000)