A CTO patient did not attend appointments to allow RC to examine patient for purpose of extending CTO within the 2 months of section expiry. Two days before the CTO authority was due to lapse a recall notice was completed by RC stating recall was for purpose A and this was served through patients letterbox of last known address. Patient turned up to the hospital named in the recall notice after the day CTO which would have otherwise lapsed - extended under s.21. Patient examined by RC within 72 hour recall period and decided to revoke the CTO. Just checking the CTO5 revocation would just be as valid if the RC completed a CTO7 as the patient never actually ceased to be liable to be detained as RC had 7 days to examine and consider the patients case from the date he returned to hospital after being AWOL. Thank you.