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Identification Period

The 45-day window after a 1031 exchange sale closes during which the seller must identify in writing the replacement property or properties they intend to acquire. The 45-day deadline is strict and not extendable; missing it disqualifies the exchange entirely and triggers immediate recognition of the deferred gain. The identification rules permit identifying multiple potential replacements (commonly under the three-property rule or the 200-percent rule), giving the seller some flexibility, but the timing is unforgiving.

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