Check if a string has certain characters

[Viking]

SCANRPL can be used to find certain characters in your string and replace them with something else, even '' (nothing), i.e. remove them.

[wegrace]

Use bif %check()

[RDKells]

Hello,

I have a string that has text in it like 'Description' and I want to check it doesn't contain the following 3 characters; . ' "

After googling and testing myself, as far I can see the only options I have are;

1. Use xlate (which would involve putting every allowed value into a string to compare... not feasible)
2. Use SCAN on each character

Surely there's a way of doing this on 1 line?

Cheers,
Ryan