THE STARGATE OMNIPEDIA
MEMORY STAMP
Procedure making an individual forget an entire lifetime of memories. Once the operation is successful, an artificial identity can be superimposed over the real one. Earth Humans are less susceptible to the memory stamp procedure, and Jaffa are even less suppressed by it. When this is the case, memory stamping must be a regular procedure to maintain the façade of the superimposed memories.

KEY EPISODE(S) -
Beneath the Surface - SG-1 is taken captive by the administration of P3R-118. Their memories stamped, they are unable to remember their lives prior to their imprisonment underneath a self-sustaining city.