under false pretences

if you do something under false pretences, you do it when you have lied about who you are or what you are doing The police charged him with obtaining money under false pretences.

See sail under false colours

Common Names:

Name	Pronounced	Usage
Xandra	KSAHN-drah	Dutch
Peninnah	pi-NIN-ə (English), pee-NIN-ə (English)	Biblical
Lawahiz	-	Arabic (Rare)
Junko	joon-ko	Japanese
Zia	-	Arabic
Masamba	-	Eastern African, Yao