Here's a test invoice
lnbc10u1pjza5ttpp5e9gtdffqeequmn4ncwdtmj9yhcq49k7q6uur06arvg4pyfhervwshp55hjywvngh0zrhmvnrkp0mt9lpz39g3mykxepnhfzulf3phvlanuscqzpgxqyz5vqsp5x5jsjuzrjk2ad5xzcpnkp3w6nxx8vuyla52rj3r2gek0cxjnnuuq9qyyssq5rmlw0te55ultjdx3r35rcf5lcscaptfpmqzmkm56pat44fzgy7z6n78rfnz5dq2tcl9804puh249zzu27qecelgsvkev4r5540t7jgqq30h8m