Can't send Bitcoin, because of old address?

[Relat]

Hi,

I can't send Bitcoins with Electrum, because it won't recognise the other address as valid, while i know for certain it is.
I heard this could be the case, because i still use an old address, that starts with 1. Could this be the case? If it is, what can i do now?

Thanks

[achow101]

I can't send Bitcoins with Electrum, because it won't recognise the other address as valid, while i know for certain it is.

Are you sure that the address is valid? Are you absolutely sure that you are entering it in correctly? If you enter the address on a block explorer, does it give you an error or give you a page with info about the address?

I heard this could be the case, because i still use an old address, that starts with 1. Could this be the case? If it is, what can i do now?

No, those addresses are not old and are still used. That is not your problem.

[Relat]

Sry, i assumed the address was valid, because it was an Invoice Adress from BitPay. Turns out it actually is not. Seems to be a problem on their end.

[Abdussamad]

addresses have checksums in them. this means that invalid addresses will be identified as such by software like electrum.