If your father wants a check from the 529: He downloads form from website, 0 day.
He may have to get a medallin notary on the withdrawal and goes to his Bank next day +1.
He drops verified signatured form in US mail which takes 2 days to get to 529 people, +3 days.
The 529 processing people verifies signiture, processes authorization, and prints check takes 3 days, +6 days.
A weekend occurs, +8 days.
Processer sends check by US Mail to grandfather, 3 days, +11.
Grandfather receives check on Friday and too late to go to Bank, weekend + 2 days, +13 elapsed.
Deposit check on Monday, Bank imposes check verification and clearing, +7, +20 days.
Weekend comes around again while in verification, +2, +22 days.
529 check clears, He writes to personal check to you, in person, +0, +22 days.
You deposit his check into your bank account, +0, +22.
You use same bank as father and the float time is reduced to +3 days, +25.
You write check to son and mail to him at school. +3 days, +28.
Son deposits check at local bank at school. Float is +3 days. +31.
Weekend +2, +33.
Son writes check to school. Float is +3, +36.
School balances account. Opps, past due date has past and a $50 late fee imposed.
Even if your Father sends a check, or requests the 529 people to send check to son, The process takes time, increases the chance of misdirection, misappropriation, and need for record keeping.
If your father requests a check and gives you the money for further distribution, Plan on no less than 2 weeks for the money to hit school. It took us 2 weeks to have check paid to school from 529 people, from original request to final receipt. A wire request will take, 1 day. A direct deposit to school 2 or 3 days.
KISS, Have father request that money be sent directly to school. No need to keep detailed tracking records since 529 people has record of transaction.