RegEvidenceHub Sponsor helps employers and advisers check how defined employee or organisation changes affect UK Skilled Worker sponsor duties. It covers salary, role, work-location, absence, delayed-start, stopping-sponsorship, TUPE, merger, takeover, and related change events. It returns explicit AFFECTED, NOT_AFFECTED, REVIEW_REQUIRED, or INSUFFICIENT_INPUT states with official GOV.UK evidence and does not provide legal advice or Home Office approval.