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The first 3 good candidates to AM CVn (double degenerate binaries) binaries in a globular cluster were recently identified with HST photometry. One of them is N1851-FUV1 which was identified as a short period (18 minutes) far-ultraviolet variable near the center of the globular cluster NGC 1851 (Zurek et al 2016). The other 2 candidates have been identified in the globular cluster 47 Tuc (Rivera Sandoval et al 2018) based on a combination of the their X-ray and optical-near-ultraviolet properties. A far-ultraviolet spectrum of each of these candidates will confirm or refute these candidates as AM CVn. Their confirmation will establish globular clusters as factories of compact binaries that emit gravitational waves and which are expected to be detected with LISA. The characterization of these systems is crucial to be performed while HST is still working comma as it is the only telescope capable to resolve the stars in the cores of globular clusters. If confirmed comma the first comparison to AM CVns in the Galactic field will be possible comma giving direct evidence of the impact of stellar interactions in their formation and evolution. This program may enable follow-up studies to set important constraints on double degenerate binary models.