Anyone mark their oil filter

[CaliforniaCylus]

Any tips for checking if the oil filter has been changed at a service?

Would like to leave a "mark" on mine but it doesn't look easy to gain access to...

 

[dspuk]

The colour of it will let you know.

Edit. Just noticed you said filter and not oil. You can get under and take a photo. The likelihood of it not being changed would be low enough to not worry about it IMHO.