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Visit www.sustainability-conf…About Hamburg Sustainability Conference gGmbH
Tax-beneficiary organisation. Non-profit purposes: environmental protection and climate protection; equality; public health.
Steuerbegünstigte Organisation. Gemeinnützige Zwecke: Umweltschutz und Klimaschutz; Gleichberechtigung; Öffentliches Gesundheitswesen.
Translated from German by GiveRadar.
Focus areas & reach
· What they work on and whereHow it stacks up against peers
· vs. 8 similar health in GermanyConcerns
· None foundGiveRadar Analysis
Original analysis from GiveRadar's dataset of comparable organizations
From what GiveRadar has verified so far, Hamburg Sustainability Conference gGmbH has a substantially complete profile.
- GiveRadar has verified financial records for only 1% of health charities in Germany, and this is one of them. See national comparisons
- It is one of the better-documented health charities in Germany GiveRadar currently tracks, because GiveRadar has verified its contact details. Most of those have little verified data on record yet. View this cohort
- It has more complete contact information than nearly all comparable charities, with a verified website, email, phone and address on record. See national comparisons
- financial records
- disclosed leadership
- a website
- a contact email
- a donation page
- third-party accreditation
- an owner-submitted profile claim
Analysis based on GiveRadar's benchmark dataset of 2026-07-03. It describes what GiveRadar has verified, not a judgment of the organization itself.
Common questions
· Auto-generated from filings + methodologyHamburg Sustainability Conference gGmbH is a registered health nonprofit based in Berlin, Hamburg, Germany. It is registered with the German Vereinsregister (Association Register). GiveRadar's Integrity Assessment for the organization is 54/100, which reflects how much public information is available, not whether the charity is legitimate. The organization reports €340K in annual revenue.
Hamburg Sustainability Conference gGmbH has a GiveRadar Integrity Assessment of 54/100. This score combines five components: Registration (20 pts), Financial Transparency (30 pts), Governance (20 pts), Contact Availability (10 pts), and Data Recency (20 pts), with negative adjustments for any red flags. A score of 54 ('Partial transparency') means some public data is on file but key signals are missing - worth a closer look before donating. For comparison, the average integrity assessment for health charities in Germany is 63/100.
Hamburg Sustainability Conference gGmbH is located in Berlin, Hamburg, Germany.
Based on official tax filings, Hamburg Sustainability Conference gGmbH has €340K in annual revenue. Its revenue is below the peer average of €11M. Create a free GiveRadar account to view the complete financial breakdown with year-over-year trends.
Hamburg Sustainability Conference gGmbH is classified as a Health organization, registered in Germany. It operates as a Gemeinnützige GmbH. By size, it is categorized as a small organization. It has €340K in annual revenue.
According to GiveRadar's records, Hamburg Sustainability Conference gGmbH is registered with the German Vereinsregister (Association Register) and overseen by the local Amtsgericht (district court). GiveRadar provides data for research and does not endorse any organization. A GiveRadar Integrity Assessment reflects how much public data is available, not whether an organization is safe to donate to, so it is always smart to do your own research before giving.
Tax-beneficiary organisation. Non-profit purposes: environmental protection and climate protection; equality; public health. Hamburg Sustainability Conference gGmbH is classified as a health organization registered in Germany.
Among health charities registered in Germany: Its annual revenue of €340K is below the peer average of €11M.
Hamburg Sustainability Conference gGmbH is a registered nonprofit in Germany. Donations to recognized charitable organizations (gemeinnuetzige Organisationen) are tax-deductible up to 20% of your total income. You will need a donation receipt (Zuwendungsbestaetigung) from the organization for your tax return.
Hamburg Sustainability Conference gGmbH is a gemeinnützige GmbH (gGmbH) - a nonprofit limited liability company. The gGmbH combines the commercial structure of a GmbH with a nonprofit mandate: profits must be reinvested in the charitable purpose and cannot be distributed to shareholders. The gGmbH is increasingly popular for social enterprises and charitable subsidiaries. It is governed by the GmbH-Gesetz with additional requirements from the Abgabenordnung for the 'gemeinnuetzig' designation. German nonprofits are listed in the Zuwendungsempfaengerregister (ZER), the federal register of tax-exempt donation recipients maintained by the Bundeszentralamt fuer Steuern (BZSt).
You can verify Hamburg Sustainability Conference gGmbH's charitable status in several ways. First, check the Zuwendungsempfaengerregister (ZER) at https://www.bzst.de/DE/Unternehmen/Zuwendungsempfaengerregister_organisation/zuwendungsempfaengerregister_organisation_node.html - the BZSt maintains this federal register of all organisations eligible to receive tax-deductible donations in Germany. Second, you can look up the association in the Vereinsregister (association register) at the local Amtsgericht (district court) via https://www.handelsregister.de/ - this confirms the legal form, registered address, and board members. Third, check whether the organisation holds the Freistellungsbescheid (tax-exemption notice) from its local Finanzamt - the notice is re-issued every three years and confirms the 'gemeinnuetzig' status under the Abgabenordnung. Legitimate charities publish this on their website or provide it on request.
Contact Hamburg Sustainability Conference gGmbH directly for current donation methods. German charities typically accept SEPA bank transfer (Ueberweisung) to the organisation's IBAN, SEPA direct debit (Lastschrift/Einzugsermaechtigung) for recurring donations, PayPal, credit card payments, and online payment processors like Stripe or Mollie. Many German charities use platforms like betterplace.org, GoFundMe, or their own Spendenseite (donation page). International donors can give via SEPA transfer (Germany is in the eurozone) or PayPal. For your donation to be tax-deductible, you need a Zuwendungsbestaetigung (donation receipt) from the organisation - for amounts up to 300 euros, a bank statement showing the transfer is sufficient.
Hamburg Sustainability Conference gGmbH is based in Berlin, in the Free and Hanseatic City of Hamburg, Germany's second-largest city and a major port. Germany is a federation of 16 states (Bundeslaender). Charitable status ('Gemeinnuetzigkeit') is granted by the local Finanzamt and recognised nationwide - the organisation can solicit tax-deductible donations from donors anywhere in Germany.
See 5 years of revenue, expense breakdowns, and balance sheet.
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Tax-deductibility for donors
German donations are deductible if Hamburg Sustainability Conference gGmbH holds a Freistellungsbescheid (recognition as a charitable purpose) and issues a Zuwendungsbestätigung receipt.
Hamburg Sustainability Conference gGmbH is in Germany, a TGE (Transnational Giving Europe) member country. Dutch donors can route gifts via Stichting Transnational Giving Europe to receive Dutch ANBI-equivalent deductibility, subject to TGE's 5% pass-through fee.
Hamburg Sustainability Conference gGmbH is registered in Germany. US donors generally cannot deduct gifts to non-US charities directly. To claim a deduction, route the gift through a US 'Friends of' fiscal sponsor or a donor-advised fund that performs equivalency determination (IRS Rev. Proc. 92-94).
Always confirm tax treatment with the charity directly or your tax advisor before donating.
Leadership
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Sign up to write a reviewCause areas in Germany
How many charities work in each area, with this charity's area highlighted.
Most common causes in Germany
Causes charities work on most.
Sources and verification
- Registration and legal identity
- Bundesanzeiger (German Federal Gazette)
- Financial filings
- Bundesanzeiger annual disclosures
Data freshness
What we know and don't know
Exactly which public data we hold on this charity. Our score reflects transparency, not impact.
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Financial data · Annual revenue figure on record
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Named leadership · Lead officer named
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Official website · On record
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Headquarters address · On file
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Direct contact · Email or phone published
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Executive payTop-officer pay not disclosed
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Government registrationNo public registry ID
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Mission statementNo self-published statement of purpose
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Programs & activitiesNo named programs listed by the charity
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Tax-deductibilityNot verified
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Founding dateYear founded not on file
Methodology
GiveRadar builds each profile primarily from official government charity registries, supplemented where available by third-party nonprofit databases and news archives, and combines it into a single 0-100 integrity assessment. The exact sources for this charity are listed above. We don't take a cut of any donation, ever.
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Quick facts about Hamburg Sustainability Conference gGmbH
- What is Hamburg Sustainability Conference gGmbH?
- Hamburg Sustainability Conference gGmbH is a health non-profit limited company based in Berlin, Germany. Tax-beneficiary organisation. Non-profit purposes: environmental protection and climate protection; equality; public health.
- Who leads Hamburg Sustainability Conference gGmbH?
- Henry Alt-Haaker serves as Managing Director.
- Where is Hamburg Sustainability Conference gGmbH located?
- Headquartered in Berlin, Hamburg, Germany.
- What is Hamburg Sustainability Conference gGmbH's annual budget?
- Annual revenue is approximately €100K-€1M.
- Is Hamburg Sustainability Conference gGmbH trustworthy?
- Hamburg Sustainability Conference gGmbH has a GiveRadar Integrity Assessment of 54 out of 100 (Partial transparency). The score reflects public-data transparency: registration, financial disclosure, governance, contact details, and how recently data was refreshed. It does not measure program impact.
- What is Hamburg Sustainability Conference gGmbH's website?
- https://www.sustainability-conference.org
- Are donations to Hamburg Sustainability Conference gGmbH tax-deductible?
- Donations may be tax-deductible for residents of Germany under local rules. US donors should check whether the charity has an equivalency-determination letter or a US-based fiscal sponsor before claiming a deduction.