Dear Sir/Madam,
I write this email in response to your query regarding __________(ID Card/background check/Application Form/exam form/other). I would like to formally request you to submit your photograph in order to complete your ________ (ID Card/background check/Application Form/exam form/other) formalities.
Therefore, I request you to kindly submit the photo and pending documents for official purposes. I hope that you will submit the required documents before __/__/____ (date) to avoid any further delay in the required process. If you have any concerns regarding the same, you can feel free to contact me at any time.
Regards,
__________ (Name),
__________ (Contact details)