The Board of Immigration Appeals has determined that its appeal deadline is a claims processing rule, and that a late-filed appeal is subject to equitable tolling of the deadline if the appealing party demonstrates that he pursued his rights diligently and that some extraordinary circumstance prevented timely filing. “An extraordinary circumstance may include those situations where reasonable expectations about an event’s occurrence are interrupted. One example is where a party uses a guaranteed delivery service, and the service fails to fulfill its guarantee. Here, counsel for the respondents has not explained how a document was inadvertently mailed, rather than sent by guaranteed overnight delivery.”
The full text of Matter of Morales-Morales can be found here: