I just last week got around to claiming an insurance reimbursement for a medical procedure from December. I can usually claim these online,and tried to do that promptly, but then just kept forgetting to take the receipt when I passed /right by the office/ every time I went in to work... I felt particularly stupid when I found out that, due to high medical expenses last year, I got almost $500 back... I had been expecting $120...
To be fair, I'm usually better than this. The medical procedure was, I think, a bit frightening and depressing, so I think I just kept not wanting to make chitchat about it with someone in person.