The best replacement for identification is authentication.

The best alternatives to identification are rated as following:

★★★★★	authentication
★★★	internalization
★★	verification
★★	recognition
★	rfid
★	rfid personal identification
★	culture identification
★	introjection
★	classification
★	projection
	identity
	barcodes
	authentification
	show-up identification
	ideology

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Speaking about identification, one probably shouldn't forget about having identification.

Other search terms related to identification and their ratings are:

★★★★★	having identification
★★	identification
★★	social security card
★	birth certificate
	any identification

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Google Trends

Scale is based on the average worldwide traffic of identification in all years. Click on graph for more.

identification

authentication

internalization