Send 25 rows.
Get 10 checked.
Old lists in, checked sample out. Twenty-five rows in, ten checked back.
01
Rows in
Name, company, email per line. Title optional.
02
Checks run
Spelling plus domain plus title checks.
03
Ten back
Verified sample within 2 working days.
04
Feed after
T1, T2, T3 run the same checks at volume.