informal phrase

[carolin143]

hi
just wanted to know if the word " doublecheck" is a formal american word and also wanted to know which one is correct among the two ie " with regards to " and " with regard to "
thank you

[carolin143]

just wanted to know if the word " doublecheck" is a formal american word and also wanted to know which one is correct among the two ie " with regards to " and " with regard to "

[Tdol]

You can use it formally if you want, though most would write it as two words or with a hyphen. I'd use 'regard'.