npkn

So I already mailed my US passport to the embassy with every document and item required on the checklist. But after rereading the website, I noticed they ask for a printout of the email payment confirmation you receive after buying the Insured Return Envelope from Thailand Postmart. I already wrote the correct invoice number (starting with THP) on the Checklist, but did not include a printout because the checklist didn't ask for it, and I also didn't receive an email because I did it on my phone so it didn't occur to me I had anything more to print. I also noticed older Checklists ask for the printout but the current one does not. Do y'all think I'll be alright or do I need to go make an appointment for this? Trying to avoid any delays. Thanks.