We are working with a London-based organisation that requires an experienced Accounts Receivable Administrator to support the finance team during a busy period. This is a hands-on role suited to someone who can step in quickly and manage AR processes with minimal supervision.This role is paying 150 - 200 a day inside ir35 with hybrid working available. Key ResponsibilitiesHigh-volume cash allocation within Sage 200Investigating and resolving unallocated cash and payment discrepanciesMaintaining accurate customer ledgers and aged debt reportsLiaising with internal teams and customers to resolve payment queriesSupporting credit control activities where requiredAssisting with AR reconciliations and month-end reportingEnsuring strong attention to detail, accuracy and clear audit trailsRequired ExperienceProven experience in an Accounts Receivable / AR Administrator roleHands-on Sage 200 experience is essentialStrong cash allocation and reconciliation backgroundConfident working in a fast-paced, high-volume finance environmentGood Excel skillsAble to work independently and hit the ground runningAvailable to start immediately DesirableExperience in interim or temporary finance rolesAAT qualified or equivalent practical experience