Yes, but make sure you don't miss the deadline to submit your claim because you are waiting for evidence. If you don't have your evidence when you are submitting your EC claim, tick the 'Submit evidence later' option on the last page of your EC claim form.
You'll receive an email confirming the evidence deadline and letting you know that we can't consider your claim until you've provided your evidence. If you miss the evidence deadline, we may not be able to accept your claim - if this happens, you'll be given further information about how you may be able to appeal this decision.
Information about evidence deadlines and how to upload additional evidence after you've submitted your claim is on our extenuating circumstances website.