Very. One person or couple per line, in whatever shorthand you actually wrote it in — "Auntie Carol, cheque", "Sam and Priya, the fancy toaster", "Mr Osei, came, no gift". It is read generously and every line becomes its own note; nothing on your list gets dropped.

No — no two notes open with the same first few words across the whole batch, the way a person writing forty by hand would naturally vary them, not the way a mail-merge repeats one template with the name swapped in.

It never states or invents an amount, whatever you gave it. Tell it what money gifts are going towards and it can say that in general — "straight into the honeymoon fund" — without attaching a figure to any one guest's note.

They get a genuinely warm note thanking them for being there, never a line that draws attention to there being no gift. Turning up is the thing you are thanking them for, and it is treated as enough.

Top up once, then top up again when your balance runs low. Wedding Thank-You Notes is about 30p — never more than 40p — and you are charged only what it actually used, for the whole batch in one go. A job that fails to generate spends nothing at all.