MikeATC Retired FAA, NATCA Member Nashville TN

With VFR/OTP once the acft gets OTP and is VFR I ask them, "Report cancelling IFR", I want no confusion about whether the pilot is IFR or VFR once he reaches VFR on Top.

As for seperation, until the acft reports VFR/OTP I provide IFR seperation, once the acft reports VFR/OTP and has cancelled IFR, but wants flight following to someplace outside my airspace, I leave them on the discrete code so that I can hand them off, and I provide VFR seperation standards.

If the acft wants to stay within my airspace but wants to be VFR/OTP if the pilots wants VFR advisories I will leave them tagged up, if they don't want advisory services I will terminate VFR and tell them to squawk VFR, I've found that most pilots want to retain advisory services.