Can a sponsorship undertaking be transferred to someone else if the original sponsor cannot continue?

Generally, no — a sponsorship undertaking cannot simply be transferred to someone else if the original sponsor is unable to continue. The undertaking is a personal legal obligation of the sponsor (and any co-signer) who signed it, and it generally stays with that original signatory rather than passing to another family member or friend who might be willing to step in.

This can be difficult news for families where the original sponsor's circumstances have changed significantly, whether due to illness, financial hardship, or something else, and another family member wants to take over the responsibility instead. Unlike some financial obligations that can be assigned or restructured, a sponsorship undertaking is tied specifically to the person who made the promise to the government, and there generally isn't a simple mechanism to swap in a replacement.

If an original sponsor truly cannot continue to meet their obligations, this is a serious situation that needs individual, careful legal advice rather than an informal family arrangement, since there may be limited formal options depending on the specific circumstances and the stage the sponsorship or undertaking is at. An immigration lawyer can help assess what, if anything, can realistically be done given your specific facts.