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Not all solo cards have an issue number. If it isn't obvious, then yours probably doesn't have one.
where is the roll no on a debit card
A common function of the debit card is as an ATM card.
no, it is a credit card.
a mastercard can be either a debit or a credit card
Debit cards were introduced in 1977-1978. Master Charge, now called Master Card had a debit card called Signet. Visa's debit card was called Entree.