My colleague does a lot of charity stuff, shaking tins to full on dressing up for comic relief etc. I work in a very large office and she collects thousands. Per year. Thing is, she never brings in any proof of the fact she's given the money to the charity, despite people asking her. Charities ALWAYS give a personalised thank you letter. Especially for large amounts. She just brushes it off when people mention it. She does try to style it out though, like printing off generic thank you literature from the Children in need website etc. Now she is mildly light fingered in other ways, for example; We had some boxed cakes left over from work lunch that were being kept in a cupboard for next work lunch. She took these and admitted when a fuss was made. We had a dining and cutlery set we bought when we had old people come in for tea. She later took these and when someone raised the alarm she admitted it, said it was for church. Lady gave her some dresses to put on her charity stall. She came in some time later wearing one. When people bring in cakes and biscuits for their birthdays she's been spotted sneaking them into her bag on way out. Including from other sections where she doesn't know anyone. Now I know it's quite a bad accusation, but lots of people think this way. To start the ball rolling with an accusation to management is something i don't personally want to do. But seeing her collecting money has made me annoyed today. How should I play this U75?