Previously, a man in Malysia mistakenly received a telephone bill for 84 ringitt (£125 trillion [1], or $218 trillion [2]).

Also, in 2003 a man received a final demand letter for £2,320,333,681,613 from British gas [3].

[1]: https://www.theguardian.com/world/2006/apr/11/malaysia

[2]: https://www.nbcnews.com/id/wbna12247590

[3]: https://catless.ncl.ac.uk/Risks/22/61#subj2.1