Switzerland will attend a high-level meeting on tax havens taking place in Berlin on 23 June after host Germany, the most vocal critic of Swiss bank secrecy, agreed to extend an invitation to Berne, Reuters reported.

Germany has been one of the main supporters of a global campaign against tax cheats and managed to gather support for the naming and shaming of Switzerland and other opaque offshore financial centres at a Group of 20 meeting of major industrialised nations in London, held in April this year.

Swiss attendance to the Berlin tax summit had been in doubt given tension between the two neighbours, but Swiss Finance Ministry spokeswoman Delphine Jaccard said on Monday that Berne had been invited and would send a representative.

The Berlin summit is a follow-up meeting to a Franco-German initiative in Paris in October at which the two countries, which suspect many citizens hide their money in Switzerland and other offshore centres, endorsed the idea of drafting a black list of tax havens.

Switzerland, whose private banks manage around $2 trillion of foreign wealth, needs to offer more tax cooperation to avoid G20 sanctions. It has vowed to adopt international standards for tax transparency and cooperation in 12 new treaties it needs to sign by year-end to get off the hook.

Ms Jaccard said Berne has already drafted two such agreements and that they would be signed soon.