410.624—Time and place of filing request.
The request for reconsideration shall be made in writing and filed at an office of the Social Security Administration within 60 days after the date of receipt of notice of the initial determination, unless such time is extended as specified in § 410.668. For purposes of this section, the date of receipt of notice of the initial determination shall be presumed to be 5 days after the date of such notice, unless there is a reasonable showing to the contrary.