if we are not getting donor info from our form but from 3rd parties
we might miss some required info for create payment: as example below

2025-09-09T14:58:54+00:00 [INFO] (RawData) Create payment response {"type":"error","code":"bad_request","status":400,"message":"Request failed validation","details":[{"location":"body","pointer":"\/buyer\/billing_details\/last_name","message":"String should have at least 1 character","type":"string_too_short"}]}
for order id 235447353.3

Placeholder N/A in smashpig level, to pass the create payment but not pass to civi, while risk for recurring then ipn message will have the last name as Na..?
or can Gr4vy handle this case? https://wikimedia.slack.com/archives/C070F1DVBRN/p1757457577833079

zgrep -c string_too_short payments-misc-202509*.gz
payments-misc-20250901.gz:9
payments-misc-20250902.gz:26
payments-misc-20250903.gz:15
payments-misc-20250904.gz:149
payments-misc-20250905.gz:64
payments-misc-20250906.gz:49
payments-misc-20250907.gz:62
payments-misc-20250908.gz:47
payments-misc-20250909.gz:29
payments-misc-20250910.gz:92