invalid certificate flagging

Organic search results in the Shopify App Store

Rank		App
#1		BoomGate: Checkout Validation
#2		Address Validator AddressHero
#3		Authentica: COA Certificates
#4		King Checkout Validation
#5		Advanced Zipcode Validator
#6		VL: Checkout Address Validator
#7		AddressGuard Address Validator
#8		SMART Address Validator
#9		Blockify Age Verification 18+
#10		DS Address Validation / Block
#11		Ninja Address Validation
#12		Cart Block: checkout validator
#13		Age Verification & Age Gate 18
#14		Flatly
#15		Checkout Address Validator JP
#16		AVP ‑ Age Verification Popup
#17		EmailSignal ‑ Email Validation
#18		NA Age Verification
#19		Clearer.io Address Validator
#20		iDenfy ID Verification