If you mean APPROVE as in "to speak or think favorably of" you can convey this concept a number of ways depending on the context and extent of how you feel about the person you are "approving of"
Here are a few examples:
LIKE:
APPRECIATE:
If you mean APPROVE as in "to consent or agree to" there are some variations to the sign "AGREE"
AGREE / agreement / concur / think same / reach a deal (an agreement):
CONSENSUS-[agree/everyone agree]:
If you mean APPROVE as in "confirm":
APPROVE-[O-K-to-palm-version]:
APPROVE-[A-P-to-palm-version]:
APPROVE-[ACCEPT]:
If you wanted to convey the opposite of APPROVE as in "REJECT / NOT-APPROVED" one version is to sign "thumbs-down"
Sample sentence: You need to contact your doctor and ask if they can call here in order to let us know they approve this prescription then the insurance company will pay.
Notes:
See: ACCEPT
Notes: