I work as a PT and had a gap in between clients, so decided to go down to my local par 3 course for a quick 9 holes before my next session. I was having a reasonably good round by my standards as a high handicap player, but the 9th and final hole proved to be my best ever hole. The pin was about 110 yards away so I decided to I tee off with my Titleist DCI black triangle 9 iron. The shot felt good and to my surpise landed on the green. I didn't actually watch the ball down, I just turned to put my club back in my bag where I was starting to cut it a bit fine with timing, but I wish I did! I walked towards the hole and couldn't see my ball. There was a ball off the back right of the green as I got closer, so I walked towards it and realised it wasn't mine. From here, I strolled over to the hole to my find my ball sitting in there! I genuinely didn't know what to do and was slightly gutted that I was playing by myself so had no official witnesses, but I have attached a score card as evidence to show I did in fact sink a hole in one on hole 9.