I will shortly apply for a visit visa to the UK and I am in a peculiar situation with regards to one of the questions. The application asks if I have ever been refused a visa to any country. I have answered "Yes" and gave the details of a paperwork related refusal to Germany. After completing the application, though having not yet submitted my biometrics, the following occurred to me.
A few years ago I applied for a Canadian visa, and while the online application was in submission I had to cancel my travel plans. I wrote to the Canadian authorities and requested to cancel the application and never submitted my passport. However, despite my attempts, I was never able to confirm that the application was actually canceled and not officially "refused".
Since this sort of thing could be misinterpreted and lead to severe consequences, I have written a letter that explains the situation and will add it to my supporting documents. Is this letter sufficient?
One thing that occurs to me is that I didn't enter this information in the "Extra information" section at the end of the application, because it just didn't occur to me until a few days after. I suppose another option would be cancel and reapply.
Edit: In case it is relevant, I subsequently applied for the same Canadian visa and was approved. In that application I said that I had applied but was never refused a Canadian visa and gave details of why I withdrew the application.