This is consistent with the published rule "[y]ou can transfer points in 1,000 point increments, but only to participating frequent travel program accounts belonging to you or an owner of the company who is listed as an authorized user on the account.", but the requirement ihas not always been enforced as written.
I know the transfer points increments. I have owned Chase ink for years since the first ink bold came and have done many transfer between my spouse. This seems to be a new rule, Have spoken to three reps including two supervisors. All say transfer ONLY to own's transfer partner account and the system won't allow them to anyone else. Or send proof of business account ownership and all the documents for both persons. Adding AU/EMPLOYEE card no longer has transfer benefit like used to.